THINGS "ARE" AND WHAT THEY "APPEAR".
К оглавлению1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1617 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
68 69 70 71 72 75 76 78 79 80 81 83
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
102 103 104 105 106 107 108 109 110 112 113 114 115 117 118
119 120 121 122 123 124 125 127 128 129 130 131 132 133 134 135
138 139 140 141 142 143 144 145 146 147 148
Not only in the
preceding section, but time and again from the very commence
ment of our investigation, we have encountered the distinction
between what things are and what they appear. The distinction,
understood in a wide sense, runs through every domain of out
cognitive experience, marking off in a general way the "real "
from the "apparent," the "genuine" from the "seeming" or
" deceptive," the " true " from the " false ". Thus, we are warned
that "appearances are deceptive," and "not to judge by appear
ances ".* Whatever be the implications of the distinction, and
its bearing on the possibility of our knowing what things really
are, it is obvious that the distinction has its origin in the domain
of sense perception, and that it must be closely connected especi
ally with our manner of apprehending space. It is perfectly
familiar even to the " plain man," and fairly perplexing even
to the advanced student of epistemology. It issues in puzzling
problems. For example, if on the one hand we hold that what
appears, or is presented, to consciousness in sense perception is
the real, that (external) sense perception puts us into direct
and immediate cognitive contact with (external) reality ; and
if also what intellect conceives in the abstract is this same
concretely presented reality, i.e. if the thought-objects by which
it represents and interprets the given sense concrete are also
real, how can error or deception be possible, or how can things
ever " appear," or " be judged to be," otherwise than they really
are? 2 If, on the other hand, it be held that sense perception does
1 "The common advice, Do not judge by appearances, would be unmeaning
if it were interpreted literally; for, after all, what have we to judge by except ap
pearances? " Science of Logic, i., 66, p. 128.
a We shall deal later ex professo with this aspect of the matter. Cf. supra,
112.
167
1 68 THEOR Y OF KNO WLEDGE
not make us directly aware of, or put us into immediate
cognitive relation with, extramental reality, but directly reveals
to us only mental states provisionally assumed to be " repro
ductions " or " representations " or " appearances " of extramental
reality ; and if also (as before) intellect gets all its interpreting
concepts or thought-objects from tliese mental states, i.e. if the
objects of thought are identically the concrete " intramental "
objects of sense, only apprehended now in the abstract, how can
truth or genuine knowledge be possible, i.e. how can it transcend
what things appear mentally, and attain to what they really are
extramentally ?
It will be worth while, therefore, to examine the distinc
tion, with a view to seeing whether or how it is possible, from
normal sense perception of how things appear spatially, to attain
not only to a knowledge that things are really spatial, but also
to a knowledge as to what sort their real spatial attributes and
relations are. The inquiry will naturally lead up to an ex
position and criticism of Kant s theory on space, time, and
sense qualities generally.
When the plain man distinguishes between " appearance "
and "reality," between what a thing "appears to be" and what
it " really is," he is certainly thinking not of two distinct " things,"
one a " mental " thing (an " appearance ") and the other an
"extramental" thing (a "reality"), but of one and the same
(extramental) thing under two aspects, viz. of this thing as (he
thinks that) it now appears, and of this same thing as (he thinks
that) he otherwise knows it to be. Yet philosophers, reflecting
on the distinction, have come to think of two distinct things,
viz. the extramental thing (the " thing-in-itself " the " nou-
menon ") and a " mental " thing which they call an " appearance"
or " phenomenon " ; and some philosophers have concluded that
we can never get beyond knowledge of the latter, while others
have contended that though we can know directly only the latter
we can derive from this direct knowledge an inferential know
ledge of the former. Since the distinction between what things
really are and what they appear "first arises in our ordinary
or scientific consciousness (i.e. the consciousness for which the
problems are those of science as opposed to philosophy)," 1 we
must inquire whether the distinction as revealed there justifies
1 PRICHARD, o/. cit., p. 79.
IDEALISM ON "APPEARANCE" AND "REALITY" 169
such philosophical conclusions. Let us see how Prichard deals
with it in his criticism of Kant.
" In this consciousness [he writes] we are compelled to distinguish be
tween appearance and reality with respect to the details of a reality which,
as a whole, or in principle, we suppose ourselves to know. Afterwards in
our philosophical consciousness we come to reflect on this distinction and to
raise the question whether it is not applicable to reality as a whole. We
ask with respect to knowledge in general, and not merely with respect to
particular items of knowledge, whether we know or can know reality, and
not merely appearance. . . . Consequently, in order to decide whether the
distinction will bear the superstructure placed upon it by the philosophical
consciousness, it is necessary to examine the distinction as it exists in our
ordinary consciousness.
" The distinction is applied in our ordinary consciousness both to the
primary and to the secondary qualities of matter. . . . We say, for instance,
that the moon looks * or appears as large as the sun, though really it is much
smaller. We say that railway lines, though parallel, look convergent, just
as we say that the straight stick in water looks bent. We say that at
sunset the sun, though really below the horizon, looks above it. Again we
say that to a person who is colour blind the colour of an object looks different
to what it really is, and that water into which we put our hand may be warmer
than it appears to our touch.
" The case of the primary qualities may be considered first. . . . [And]
it will be sufficient to analyse the simplest, that of the apparent convergence
of the railway lines.
" Two points force themselves upon our notice. In the first place we
certainly suppose that we perceive the reality which we wish to know, i.e.
the reality which, as we suppose, exists independently of our perception, and
not an appearance of it. It is, as we say, the real lines which we see.
Even the term convergent, in the assertion that the lines look convergent,
conveys this implication. . . . We can say neither that an appearance is
convergent nor that the appearance of the lines is convergent. Only a reality
similar to the lines, e.g. two roads, can be said to be convergent. Our
ordinary thought, therefore, furnishes no ground for the view that the object
of perception is not the thing but merely an appearance of or produced by it.
In the second place the assertion that the lines look convergent implies
considerable knowledge of the real nature of the reality to which the assertion
relates. Both the terms lines and convergent imply that the reality is
spatial. Further if the context is such that we mean that, while the lines look
convergent, we do not know their real relation, we imply that the lines really
possess some characteristic which falls within the genus to which convergence
belongs, i.e. we imply that they are convergent or divergent or parallel. If
on the other hand, the context is such that we mean that the lines only look
convergent, we imply that the lines are parallel, and therefore presuppose
111 Looks" means "appears to sight," and ."looks" is throughout used
as synonymous with "appear," where the instance under discussion relates to
visual perception.
1 70 THEOR Y OF KNO WLEDGE
complete knowledge in respect of the very characteristic in regard to which
we state what is only appearance. The assertion, then, in respect of a primary
quality, that a thing looks so and so implies knowledge of its general character
as spatial, and ignorance only of a detail ; and the assertion that a thing
only looks or appears so and so implies knowledge of the detail in question." J
He then draws attention to the general difficulty arising from
our use of the terms " looks " and " appears " :
"If the lines are not convergent, how is it possible even to say that they
look convergent ? Must it not be implied that at least under certain circum
stances we should perceive the lines as they are ? Otherwise why should we
use the words look or appear at all ? Moreover this implication can be
pushed further ; for if we maintain that we perceive the real lines, we may
reasonably be asked whether we must not under all circumstances perceive
them as they are. It seems as though a reality cannot be perceived except as
it is.""
Such is the difficulty which has given rise to the philosophical
view that " the object of perception is not the reality but an
appearance ". How has the view arisen from it ? In this way :
" Since we do distinguish between what things look and what they are,
it would seem that the object of perception cannot be the thing, but only an
appearance produced by it. Moreover the doctrine gains in plausibility from
the existence of certain illusions in the case of which the reality to which the
illusion relates seems non-existent. For instance, if we look steadily at the
flame of a candle, and then press one eye-ball with the finger, we see, as we
say, two candles ; but since ex hypothesi there is only one candle, it seems
that what we see must be, not the candle, but two images or appearances
produced by it." :!
Nevertheless such facts furnish no real ground for the phil
osophical view that " the object of perception is not a reality, but
an appearance," and the distinction between " what a thing looks "
and "what it is " can be explained without recourse to such a
supposition. The distinction does imply that "at least under
certain circumstances " we perceive things " as they are " ; but it
does not imply that therefore " under all circumstances " we
should " perceive them as they are ". For, in so far as we know
what external 4 things are really and externally, we know this
1 PRICHARD, op. cit., pp. 80-2 (italics in first paragraph ours).
2 Ibid., p. 82. "Ibid., pp. 82-3.
4 Even in abnormal sense perception it is a real function of extramental reality
(including the perceiver^s organism) to appear as it actually does. In the case of
sense illusions and hallucinations it is the intellect that is at fault in judging the
perceived reality to be exclusively external when it is either partly organic (as in
illusions) or wholly organic (as in hallucinations). In both cases a product of
IDEALISM ON APPEARANCE " AND REALITY" \ 7 1
from what they appear in certain, i.e. normal circumstances : our
intellectual knowledge of " what they are really and externally "
is an accumulation of judgments or interpretations of " what
they appear " to our various senses in normal conditions > their
necessary relativity to the subjective organic factor being always
understood in these judgments. 1 Hence it does not follow that
" what a thing appears " in any individual act or process of per
ception must be always a part or function of what the thing is
really and externally, i.e. of what it is known to appear in normal
perception ; for the individual act in question may be abnormal,
and if it is, what the " external " thing appears in it will be
partly due to the abnormal organic factor, and therefore will not
reveal " what the thing is really and externally ".
The distinction in question certainly supposes that in some
cases at least we perceive things as they are ; for in regard to
external things part of what we mean by " what they are really
and externally" is "what we know them to appear in normal
sense perception ". Let us pursue Prichard s analysis. He
continues : 2
The distinction between the actual and the apparent angle made by two
straight lines presupposes a limiting case in which they coincide. If the line
of sight along which we observe the point of intersection of two lines is known
to be at right angles to both lines, we expect, and rightly expect, to see the
angle of intersection as it is. Again if we look at a short portion of two rail
way lines from a point known to be directly above them, and so distant that
the effects of perspective are imperceptible, we can say that the lines look what
they are, viz. parallel. Thus from the point of view of the difficulty which
has been raised, there is this justification in general for saying that two lines
look parallel or look at right angles, that we know that in certain cases what
they look is identical with what they are. In the same way assertions that
the moon looks as large as the sun receive justification from our knowledge
that two bodies of equal size and equally distant from the observer are what
they look, vis. of the same size. And in both cases the justification pre
supposes knowledge of the reality of space and also such insight into its
nature as enables us to see that in certain cases there must be an identity
between what things look and what they are in respect of certain spatial
relations. Again, in such cases we see that so far is it from being necessary
to think that a thing must be perceived as it is, that it is not only possible but
necessary to distinguish what a thing looks from what it is, and precisely in con
sequence of the nature of space. The visual perception of spatial relations from
its very nature presupposes a particular point of view . . . and is therefore
imagination (a genuine " mental image") is confused in consciousness with the per
ceived object, or mistaken for a perceived object.
1 Cf. supra, 120-2. 2 Op. cit., pp. 83-5.
1 72 THEOR V OF KNO PLEDGE
subject to conditions of perspective. This is best realized by considering the
supposition that perfect visual powers would enable us to see the whole of a
body at once, and that this perception would be possible if we had eyes
situated all round the body. The supposition obviously breaks down through
the impossibility of combining two or more points of view in one perception.
But if visual perception is necessarily subject to conditions of perspective, the
spatial relations of bodies can never look what they are except in the limiting
case referred to. Moreover, this distinction is perfectly intelligible, as we
should expect from the necessity we are under of drawing it. We understand
perfectly why it is that bodies must, in respect of their spatial relations, look
[i.e. to sight] different to what they are. ... It is, therefore, needless to make
the assertion " Two lines appear convergent " intelligible by converting the
verb " appears " into a substantive, ? /r. an " appearance," and then making
the assertion relate to an " appearance ". For . . . the assertion ... is
perfectly intelligible in itself though not capable of being stated in terms of
anything else. 1 If we generalize this result [he concludes], we may say that
the distinction between appearance and reality, drawn with regard to the
primary qualities of bodies, throughout presupposes the reality of space, 2 and
is made possible, and indeed necessary, by the nature of space itself.
The distinction, therefore, between what the primary qualities
or spatial relations of things "look" or "appear" to sight, and
what these qualities or relations are "really and externally," is
1 " It is important," the author adds (ibid., p. 85 n.), " to notice that the proper
formula to express what is loosely called an appearance is A looks or appears
B, and that this cannot be analysed into anything more simple and, in particular, into
a statement about appearances . Even in the case of looking at the candle, there
is no need to speak of two appearances or images . Before we discover the
truth the proper assertion is The body which we perceive looks as if it were two
candles, and, after we discover the truth, the proper assertion is The candle looks
as if it were in two places ."
The inclination to speak, in such cases, of perceiving " two images " (and to
draw the erroneous conclusion that what we always perceive is merely a mental
" image " or " appearance," and never the " external reality ") is due to the fact that
we have, and are constantly exercising, the faculty (imagination) of reproducing
" mental images" of perceived objects in the absence of these latter. The case in
point is a simple and admirable instance of an " optical illusion ". We " know "
that " what appears" is external to us because we interpret the concrete " felt ex
ternality" to be real, and arc conscious that the actual conditions, abnormal though
they are, are not so abnormal as to vitiate this interpretation. But " what it ap
pears " (" two candles ") is not " what it is really and externally " (" one candle ").
If we " know " this is the case, how do we know it ? Because we know (r) that " what
it is really and externally " means (i.e. means partially, inadequately : the part of its
reality known through interpretation of what it reveals to us through the sense of
vision means) what it is known by us to appear in normal conditions of visual per
ception ; and (2) that the conditions of our actual perception are not normal, and
therefore do not reveal " what the thing is really and externally ".
2 Rather " presupposes that we know spatial relations to characterize, and apper
tain to, the extramentally external thing or reality which appears". But how we
know or can know this, the author seems to us to leave unexplained. Cf. supra.
125 ; infra, pp. 173-5.
IDEALISM ON "APPEARANCE" AND "REALITY" 173
quite intelligible without recourse to the assumption that what
we see are only mental appearances. It presupposes (i) that we
know what things are really and externally in respect of these
qualities ; and (2) that we know the nature of space and the
conditions of visual perception to be such that only in certain
cases is " what the thing appears to sight " (as regards spatial
relations) identical with what we otherwise know these spatial
relations to be " really and externally ". But of course we know
intellectually what space is and what spatial relations are " really
and externally," only from the way in which things appear
spatially to our senses especially to sight and touch (active
and passive touch, including the muscular sense of motion and
resistance to muscular effort) in normal sense perception. Re
flection shows us that in the end it is really meaningless to
contend that things never reveal to us their primary qualities or
spatial relations as these are " really and externally " ; for by
what these qualities and relations are "really and externally"
we mean what they appear to us in normal sense perception, i.e.
what we judge them to be by interpreting them as thus appear
ing, through the aid of concepts derived from what they reveal
to our consciousness in sense perception. 1
Hence we are forced to disagree with Prichard when, after pronounc
ing all the secondary qualifies to be merely conscious states or " sensa
tions " (and to be by implication incapable of giving us any knowledge about
extramental reality) he goes on to contend that our sense apprehension even
of the primary qualities or spatial relations never reveals these as they are
really and externally " (and by implication that our intellectual knowledge of
what real extension, externality, space, and spatial relations are, is altogether
independent of what they appear in sense perception). On the contrary, we
do perceive (i) not only the primary qualities, but (2) the secondary qualities,
as they are really and externally ; and moreover (3) if this were not so we
could never prove against any form of idealism that the intellectual know
ledge we have of a world of data characterized by such qualities is knowledge
of a really extramental, external, spatial universe, and not merely a knowledge
of subjective mental phenomena or conscious states (125).
1 It must not be forgotten that we accumulate our knowledge of what things
are "really and externally" by using concepts derived from all the data of the
various senses. Therefore what an external thing presents in any individual act of
perception is usually only a small part of what we already know the total external
reality of the thing to be. And this knowledge is always helping us to check, and
adjust, and if necessary correct, " what the thing appears " in any individual per
ceptive act whose object we are interpreting : it is constantly guarding us from
erroneous and hasty spontaneous interpretations. Cf. supra, 127, pp. 162, n. i ;
166, n.
- Cf. supra, 125, pp. 144 sqq.
1 74 THEOR Y OF KNO WLEDGE
(i) Prichard s own analysis of the convergence of the railway lines
proves that " in limiting cases " we visually apprehend spatial relations as
these are " really and externally ". But what they are " really and externally,"
in respect of spatial relations, we can know only by intellectual interpretation
of what they appear in normal perception to all the senses which reveal " ex-
tensity," " externality," " voluminousness," especially to the senses of sight
and touch. Prichard, however, holding that our intellectual knowledge of what
things are spatially is independent of perception and always represents them
otherwise than as they look in perception, goes on to contend that even in the
limiting cases referred to " what a thing looks and what it is " are after all not
" identical "- 1 The reason he gives is plausible but not convincing : it is
that all such limiting cases refer only to two dimensions of space, " e.g. con
vergence and bentness,"- whereas real spatial relations are always thrce-
dimensional, so that what a thing appears spatially to sight can never be
identical with what it really is spatially. Now, even if we grant that sight
alone can apprehend only two-dimensional extension," it would follow merely
that what a spatial thing appears to sight is not the whole of what it really
is spatially ; but surely it would not follow that what the thing appears spatially
to sight cannot be a real part or ftmction of its total spatial reality. " It is
obvious," says Prichard, 4 " that two dimensions are only an abstraction from
three, and that the spatial relations of bodies, considered fully, involve three
dimensions." Of course ; but because the two dimensions are only abstrac
tions, are they on that account not real ? Are the two dimensions, perceived
by sight in the spatial things, not really in the latter ? They certainly are.
" A body may be cylindrical, and we may see a cylindrical body ; but such
a body can never, strictly speaking, look cylindrical." 5 It can never look
cylindrical to sight alone, because of the conditions of perspective ; but it can
look what our knowledge of the real spatial shape of a cylindrical body tells
us that it ought to look in such conditions. And how do we know the real
spatial shape of a cylindrical body, or that any body is really and externally
cylindrical, unless by interpreting what it appears to sight and touch in
normal conditions ? From the fact that real spatial relations are three-
dimensional Prichard infers " that terms which fully state spatial character
istics can never express what things look, but only what they are ". B The
inference is quite too sweeping. Such terms can never express what things
look to sight in any individual perception, or what they appear to touch in
any individual tactile or muscular or motor perception ; but such terms can
and do express (our intellectual interpretation of) what things appear to us in
all our various normal visual, tactile and other " extension-revealing " per
ceptions : for this is precisely what such terms do express to us about things
by expressing " what they are ". How otherwise could we know what things
are " really and externally " in respect of spatial relations ? It is by "judging
from what it looks under various conditions," 7 and in no other possible way,
that we know intellectually whatever we do know about the spatial qualities
1 Op. cit., p. 90. - Ibid.
* Binocular vision would appear to give us at least a rudimentary visual con
sciousness of objects in relief, i.e. of the third dimension of space. Possibly,
however, such consciousness is not independent of muscular sense data.
*Ibid. 5 P. 91. *Ibid. 7 P. 99. Cf. supra, 125, p. 149.
IDEALISM ON "APPEARANCE" AND "REALITY" 175
and relations which a body has really and externally. And these spatial
qualities which we judge to be in the body " really and externally " we judge
to be there not only " independently of all perception," l but independently of
all conception, thought, judgment, as well. But to say that they are there in
dependently of perception and thought is very different from saying that we
can reach knowledge of them by thought independently of perception ; for
their reality cannot be known unless by coming into relation with sense, and
through sense with intellect : and that they can be known to be there really
and externally and independently of perception and thought, means simply
that by rejection on our cognitive processes we can see that their relation to
sense and intellect does not transform their presentation to sense or falsify
their representation by intellect.
(2) The secondary qualities likewise are perceived in normal conditions
of perception " as they are really and externally ". The distinction can like
wise be drawn between what they "appear " in any individual act of percep
tion, and what they are known to be "really and externally," i.e. what they
are known to be by "judging from what " they look "under various [normal]
conditions ". 2 Of course the distinction between what things look or appear
and what they are is of most frequent occurrence in reference to spatial
qualities as apprehended by sight. But it is also drawn in reference to
colour. Arguing against the externality of colour, Prichard refers to the
difficulty of determining " the right colour of individual bodies " as "insuper
able " ; and he concludes that they have no colour, that " colour is not a
quality of bodies ". 3 But even if colours were mere " mental facts " or " sensa
tions " we should have to recognize the distinction between " right " and
" wrong " colour-sensations ; and if the cause of the distinction be not extra-
mental* (whether organic or extra-organic), the distinction is inexplicable.
Colour is, however, a real quality of external bodies. What a colour appears
in any individual act of perception depends partly on organic conditions :
hence the phenomenon of colour blindness. But even in normal organic con
ditions there is the further consideration that the same body seen from differ
ent standpoints " presents " different colours. This, however, only proves that
it has these colours simultaneously, that it reflects different " light vibrations "
in different directions.
So, too, in regard to the other secondary qualities. It is possible to draw
a distinction between " what they appear" in any individual act of sense per
ception and " what they are really and externally " ; this latter meaning
what they are known to appear in normal conditions of perception. 5 It may
indeed be " difficult and, in the end, impossible to say that a bell appears
noisy " ; 6 but we can and do rightly say, " the pitch of the whistle from the
approaching train appears to grow higher, but I know it really remains the
same," 7 or again, " I seem to hear a humming noise around me, but I know
1 Op. cit., p. 99. Cf. supra, 125, p. 149.
2 P- 99- 3 P. 87. i Cf. supra, 125.
5 Relativity to normal organic factors being tacitly understood not to falsify the
interpretation of what they are extra-organically or "externally". Cf. supra,
122.
6 Op. cit., p. 86.
7 Cf. " The railway lines only appear convergent, but I know they are really
parallel ".
1 76 THEOR Y OF KNO W LEDGE
there is really no noise but only an organic affection of the ear ". Similarly,
it is not impossible to say that " sugar appears sweet V No doubt, the
usual expression is " sugar tastes sweet " ; which is another way of saying
that "sugar appears sweet to normal perceivers," which again, intellectually
interpreted, means " sugar is sweet ". But a person whose sense of taste
is, from whatsoever cause, abnormal, can and does rightly say, " this sugar
only tastes or appears bitter to me, but I know it is really not bitter but
sweet ". Similar instances may be discovered in sensations of temperature,
touch, and smell. And the implication of the distinction is the same through
out : in no case does it imply that what we perceive is only a " mental state,"
whether we call this a " sensation " or an " appearance " ; but in all cases it
implies (a) that what appears in any and every act of sense perception " is
extramental reality ; (b) that what this extramental reality appears in the
individual perception is partly dependent on subjective, organic factors, and
on extra-organic or external conditions ; (c) that what it appears will differ
from what it is if those factors are abnormal ; inasmuch as (d) by what it is
(in so far as we know what it is) we mean the knowledge we have of it by
interpreting what it appears in normal conditions of perception.
(3) Finally this latter knowledge is as far as it goes knowledge of an
extramental universe as it is extramentally, because cognitive relation of the
latter to the mind, whether in perception or in conception, does not transform
or alter it by the projection into it of any subjective mental factors. Further
more it is knowledge of an external, spatial (and otherwise physically "quali
tative ") universe as it is externally, because its cognitive relation to the
perceiving subject as organic can be known by intellect reflecting on the pro
cess of perception ; can be discovered to be normal or abnormal as the case
may be ; is understood, when known to be normal and uniform, to be included
in what we mean by real externality, and, when known to be abnormal, can
safeguard us from the error of judging that "what the thing appears " in such
circumstances is " what it is really and externally ".
On the other hand, if we held the secondary sense qualities to be " mental
states," and the primary qualities or "spatial determinations" never to be
really and extramentally what they appear, or as they are perceived, then,
since we have no other way of knowing intellectually what spatial qualities
and things are really and extramentally than by judging from what they
appear, it would inevitably follow that our supposed knowledge of what they
are really and extramentally is an illusion.
The assumption that we can have intellectual knowledge of an extra-
mental, real, spatial universe, independently of all that appears to consciousness
in sense perception, is gratuitous and erroneous. If there is such a universe,
intellectual knowledge of it is conditioned by its being cognitively related to
intellect ; and it cannot be cognitively related to intellect unless through its
cognitive relation to sense. If, then, it always appears to sense otherwise
than it is, so consequently must it appear to intellect otherwise than it is : in
J O/. cit., p. 86.
2 Including sense " illusions," i.e. misinterpreted perceptions of external things
really presented to the perceiver ; but not including hallucinations which, being
imagination processes, do not " present " any external object, though they have an
extramental, organic, ical cause.
IDEALISM ON "APPEARANCE" AND "REALITY" 177
which case all our knowledge would be illusory if understood to refer to what
reality is extramentally ; but if understood to refer to "how it appears " it
would still be possible to distinguish between " what it appears " normally and
" what it appears " in abnormal, special conditions, and to designate the
former "true knowledge," and the latter "false or illusory knowledge," of
"how reality appears". This is Kant s position. It cannot be met by argu
ing that, in the distinction between what things appear (e.g. in respect of
spatial relations) and what they are, (a) we know " what they are " irre
spectively of what they appear, or that (<5) by " what they are " we mean
" what they are but never appear " ; for neither of these contentions can be
sustained. We refute his position rather by recognizing that the distinction
between " what things appear " (in regard to spatial and other sense
qualities) and " what they are " is a distinction between what they may
appear in an individual, abnormal case, and what they are known to appear
normally ; by admitting also the possibility of confining the distinction be
tween abnormal (" Schein ") and normal (" Erscheimtng"} to " what things
appear" ; but by showing that there is no ground whatsoever for supposing
either that "what things appear" in normal perception is anything other or
otherwise than " what they are really and extramentally and externally," or
for supposing that " what they appear to intellect" i.e. what they are in
terpreted or represented to be by intellect, is a metamorphosis or transfigura
tion of what they really are, a transformation gratuitously supposed to be
effected by subjective, mental factors contributed in the process whereby
they are cognitively related to the intellect.
Not only in the
preceding section, but time and again from the very commence
ment of our investigation, we have encountered the distinction
between what things are and what they appear. The distinction,
understood in a wide sense, runs through every domain of out
cognitive experience, marking off in a general way the "real "
from the "apparent," the "genuine" from the "seeming" or
" deceptive," the " true " from the " false ". Thus, we are warned
that "appearances are deceptive," and "not to judge by appear
ances ".* Whatever be the implications of the distinction, and
its bearing on the possibility of our knowing what things really
are, it is obvious that the distinction has its origin in the domain
of sense perception, and that it must be closely connected especi
ally with our manner of apprehending space. It is perfectly
familiar even to the " plain man," and fairly perplexing even
to the advanced student of epistemology. It issues in puzzling
problems. For example, if on the one hand we hold that what
appears, or is presented, to consciousness in sense perception is
the real, that (external) sense perception puts us into direct
and immediate cognitive contact with (external) reality ; and
if also what intellect conceives in the abstract is this same
concretely presented reality, i.e. if the thought-objects by which
it represents and interprets the given sense concrete are also
real, how can error or deception be possible, or how can things
ever " appear," or " be judged to be," otherwise than they really
are? 2 If, on the other hand, it be held that sense perception does
1 "The common advice, Do not judge by appearances, would be unmeaning
if it were interpreted literally; for, after all, what have we to judge by except ap
pearances? " Science of Logic, i., 66, p. 128.
a We shall deal later ex professo with this aspect of the matter. Cf. supra,
112.
167
1 68 THEOR Y OF KNO WLEDGE
not make us directly aware of, or put us into immediate
cognitive relation with, extramental reality, but directly reveals
to us only mental states provisionally assumed to be " repro
ductions " or " representations " or " appearances " of extramental
reality ; and if also (as before) intellect gets all its interpreting
concepts or thought-objects from tliese mental states, i.e. if the
objects of thought are identically the concrete " intramental "
objects of sense, only apprehended now in the abstract, how can
truth or genuine knowledge be possible, i.e. how can it transcend
what things appear mentally, and attain to what they really are
extramentally ?
It will be worth while, therefore, to examine the distinc
tion, with a view to seeing whether or how it is possible, from
normal sense perception of how things appear spatially, to attain
not only to a knowledge that things are really spatial, but also
to a knowledge as to what sort their real spatial attributes and
relations are. The inquiry will naturally lead up to an ex
position and criticism of Kant s theory on space, time, and
sense qualities generally.
When the plain man distinguishes between " appearance "
and "reality," between what a thing "appears to be" and what
it " really is," he is certainly thinking not of two distinct " things,"
one a " mental " thing (an " appearance ") and the other an
"extramental" thing (a "reality"), but of one and the same
(extramental) thing under two aspects, viz. of this thing as (he
thinks that) it now appears, and of this same thing as (he thinks
that) he otherwise knows it to be. Yet philosophers, reflecting
on the distinction, have come to think of two distinct things,
viz. the extramental thing (the " thing-in-itself " the " nou-
menon ") and a " mental " thing which they call an " appearance"
or " phenomenon " ; and some philosophers have concluded that
we can never get beyond knowledge of the latter, while others
have contended that though we can know directly only the latter
we can derive from this direct knowledge an inferential know
ledge of the former. Since the distinction between what things
really are and what they appear "first arises in our ordinary
or scientific consciousness (i.e. the consciousness for which the
problems are those of science as opposed to philosophy)," 1 we
must inquire whether the distinction as revealed there justifies
1 PRICHARD, o/. cit., p. 79.
IDEALISM ON "APPEARANCE" AND "REALITY" 169
such philosophical conclusions. Let us see how Prichard deals
with it in his criticism of Kant.
" In this consciousness [he writes] we are compelled to distinguish be
tween appearance and reality with respect to the details of a reality which,
as a whole, or in principle, we suppose ourselves to know. Afterwards in
our philosophical consciousness we come to reflect on this distinction and to
raise the question whether it is not applicable to reality as a whole. We
ask with respect to knowledge in general, and not merely with respect to
particular items of knowledge, whether we know or can know reality, and
not merely appearance. . . . Consequently, in order to decide whether the
distinction will bear the superstructure placed upon it by the philosophical
consciousness, it is necessary to examine the distinction as it exists in our
ordinary consciousness.
" The distinction is applied in our ordinary consciousness both to the
primary and to the secondary qualities of matter. . . . We say, for instance,
that the moon looks * or appears as large as the sun, though really it is much
smaller. We say that railway lines, though parallel, look convergent, just
as we say that the straight stick in water looks bent. We say that at
sunset the sun, though really below the horizon, looks above it. Again we
say that to a person who is colour blind the colour of an object looks different
to what it really is, and that water into which we put our hand may be warmer
than it appears to our touch.
" The case of the primary qualities may be considered first. . . . [And]
it will be sufficient to analyse the simplest, that of the apparent convergence
of the railway lines.
" Two points force themselves upon our notice. In the first place we
certainly suppose that we perceive the reality which we wish to know, i.e.
the reality which, as we suppose, exists independently of our perception, and
not an appearance of it. It is, as we say, the real lines which we see.
Even the term convergent, in the assertion that the lines look convergent,
conveys this implication. . . . We can say neither that an appearance is
convergent nor that the appearance of the lines is convergent. Only a reality
similar to the lines, e.g. two roads, can be said to be convergent. Our
ordinary thought, therefore, furnishes no ground for the view that the object
of perception is not the thing but merely an appearance of or produced by it.
In the second place the assertion that the lines look convergent implies
considerable knowledge of the real nature of the reality to which the assertion
relates. Both the terms lines and convergent imply that the reality is
spatial. Further if the context is such that we mean that, while the lines look
convergent, we do not know their real relation, we imply that the lines really
possess some characteristic which falls within the genus to which convergence
belongs, i.e. we imply that they are convergent or divergent or parallel. If
on the other hand, the context is such that we mean that the lines only look
convergent, we imply that the lines are parallel, and therefore presuppose
111 Looks" means "appears to sight," and ."looks" is throughout used
as synonymous with "appear," where the instance under discussion relates to
visual perception.
1 70 THEOR Y OF KNO WLEDGE
complete knowledge in respect of the very characteristic in regard to which
we state what is only appearance. The assertion, then, in respect of a primary
quality, that a thing looks so and so implies knowledge of its general character
as spatial, and ignorance only of a detail ; and the assertion that a thing
only looks or appears so and so implies knowledge of the detail in question." J
He then draws attention to the general difficulty arising from
our use of the terms " looks " and " appears " :
"If the lines are not convergent, how is it possible even to say that they
look convergent ? Must it not be implied that at least under certain circum
stances we should perceive the lines as they are ? Otherwise why should we
use the words look or appear at all ? Moreover this implication can be
pushed further ; for if we maintain that we perceive the real lines, we may
reasonably be asked whether we must not under all circumstances perceive
them as they are. It seems as though a reality cannot be perceived except as
it is.""
Such is the difficulty which has given rise to the philosophical
view that " the object of perception is not the reality but an
appearance ". How has the view arisen from it ? In this way :
" Since we do distinguish between what things look and what they are,
it would seem that the object of perception cannot be the thing, but only an
appearance produced by it. Moreover the doctrine gains in plausibility from
the existence of certain illusions in the case of which the reality to which the
illusion relates seems non-existent. For instance, if we look steadily at the
flame of a candle, and then press one eye-ball with the finger, we see, as we
say, two candles ; but since ex hypothesi there is only one candle, it seems
that what we see must be, not the candle, but two images or appearances
produced by it." :!
Nevertheless such facts furnish no real ground for the phil
osophical view that " the object of perception is not a reality, but
an appearance," and the distinction between " what a thing looks "
and "what it is " can be explained without recourse to such a
supposition. The distinction does imply that "at least under
certain circumstances " we perceive things " as they are " ; but it
does not imply that therefore " under all circumstances " we
should " perceive them as they are ". For, in so far as we know
what external 4 things are really and externally, we know this
1 PRICHARD, op. cit., pp. 80-2 (italics in first paragraph ours).
2 Ibid., p. 82. "Ibid., pp. 82-3.
4 Even in abnormal sense perception it is a real function of extramental reality
(including the perceiver^s organism) to appear as it actually does. In the case of
sense illusions and hallucinations it is the intellect that is at fault in judging the
perceived reality to be exclusively external when it is either partly organic (as in
illusions) or wholly organic (as in hallucinations). In both cases a product of
IDEALISM ON APPEARANCE " AND REALITY" \ 7 1
from what they appear in certain, i.e. normal circumstances : our
intellectual knowledge of " what they are really and externally "
is an accumulation of judgments or interpretations of " what
they appear " to our various senses in normal conditions > their
necessary relativity to the subjective organic factor being always
understood in these judgments. 1 Hence it does not follow that
" what a thing appears " in any individual act or process of per
ception must be always a part or function of what the thing is
really and externally, i.e. of what it is known to appear in normal
perception ; for the individual act in question may be abnormal,
and if it is, what the " external " thing appears in it will be
partly due to the abnormal organic factor, and therefore will not
reveal " what the thing is really and externally ".
The distinction in question certainly supposes that in some
cases at least we perceive things as they are ; for in regard to
external things part of what we mean by " what they are really
and externally" is "what we know them to appear in normal
sense perception ". Let us pursue Prichard s analysis. He
continues : 2
The distinction between the actual and the apparent angle made by two
straight lines presupposes a limiting case in which they coincide. If the line
of sight along which we observe the point of intersection of two lines is known
to be at right angles to both lines, we expect, and rightly expect, to see the
angle of intersection as it is. Again if we look at a short portion of two rail
way lines from a point known to be directly above them, and so distant that
the effects of perspective are imperceptible, we can say that the lines look what
they are, viz. parallel. Thus from the point of view of the difficulty which
has been raised, there is this justification in general for saying that two lines
look parallel or look at right angles, that we know that in certain cases what
they look is identical with what they are. In the same way assertions that
the moon looks as large as the sun receive justification from our knowledge
that two bodies of equal size and equally distant from the observer are what
they look, vis. of the same size. And in both cases the justification pre
supposes knowledge of the reality of space and also such insight into its
nature as enables us to see that in certain cases there must be an identity
between what things look and what they are in respect of certain spatial
relations. Again, in such cases we see that so far is it from being necessary
to think that a thing must be perceived as it is, that it is not only possible but
necessary to distinguish what a thing looks from what it is, and precisely in con
sequence of the nature of space. The visual perception of spatial relations from
its very nature presupposes a particular point of view . . . and is therefore
imagination (a genuine " mental image") is confused in consciousness with the per
ceived object, or mistaken for a perceived object.
1 Cf. supra, 120-2. 2 Op. cit., pp. 83-5.
1 72 THEOR V OF KNO PLEDGE
subject to conditions of perspective. This is best realized by considering the
supposition that perfect visual powers would enable us to see the whole of a
body at once, and that this perception would be possible if we had eyes
situated all round the body. The supposition obviously breaks down through
the impossibility of combining two or more points of view in one perception.
But if visual perception is necessarily subject to conditions of perspective, the
spatial relations of bodies can never look what they are except in the limiting
case referred to. Moreover, this distinction is perfectly intelligible, as we
should expect from the necessity we are under of drawing it. We understand
perfectly why it is that bodies must, in respect of their spatial relations, look
[i.e. to sight] different to what they are. ... It is, therefore, needless to make
the assertion " Two lines appear convergent " intelligible by converting the
verb " appears " into a substantive, ? /r. an " appearance," and then making
the assertion relate to an " appearance ". For . . . the assertion ... is
perfectly intelligible in itself though not capable of being stated in terms of
anything else. 1 If we generalize this result [he concludes], we may say that
the distinction between appearance and reality, drawn with regard to the
primary qualities of bodies, throughout presupposes the reality of space, 2 and
is made possible, and indeed necessary, by the nature of space itself.
The distinction, therefore, between what the primary qualities
or spatial relations of things "look" or "appear" to sight, and
what these qualities or relations are "really and externally," is
1 " It is important," the author adds (ibid., p. 85 n.), " to notice that the proper
formula to express what is loosely called an appearance is A looks or appears
B, and that this cannot be analysed into anything more simple and, in particular, into
a statement about appearances . Even in the case of looking at the candle, there
is no need to speak of two appearances or images . Before we discover the
truth the proper assertion is The body which we perceive looks as if it were two
candles, and, after we discover the truth, the proper assertion is The candle looks
as if it were in two places ."
The inclination to speak, in such cases, of perceiving " two images " (and to
draw the erroneous conclusion that what we always perceive is merely a mental
" image " or " appearance," and never the " external reality ") is due to the fact that
we have, and are constantly exercising, the faculty (imagination) of reproducing
" mental images" of perceived objects in the absence of these latter. The case in
point is a simple and admirable instance of an " optical illusion ". We " know "
that " what appears" is external to us because we interpret the concrete " felt ex
ternality" to be real, and arc conscious that the actual conditions, abnormal though
they are, are not so abnormal as to vitiate this interpretation. But " what it ap
pears " (" two candles ") is not " what it is really and externally " (" one candle ").
If we " know " this is the case, how do we know it ? Because we know (r) that " what
it is really and externally " means (i.e. means partially, inadequately : the part of its
reality known through interpretation of what it reveals to us through the sense of
vision means) what it is known by us to appear in normal conditions of visual per
ception ; and (2) that the conditions of our actual perception are not normal, and
therefore do not reveal " what the thing is really and externally ".
2 Rather " presupposes that we know spatial relations to characterize, and apper
tain to, the extramentally external thing or reality which appears". But how we
know or can know this, the author seems to us to leave unexplained. Cf. supra.
125 ; infra, pp. 173-5.
IDEALISM ON "APPEARANCE" AND "REALITY" 173
quite intelligible without recourse to the assumption that what
we see are only mental appearances. It presupposes (i) that we
know what things are really and externally in respect of these
qualities ; and (2) that we know the nature of space and the
conditions of visual perception to be such that only in certain
cases is " what the thing appears to sight " (as regards spatial
relations) identical with what we otherwise know these spatial
relations to be " really and externally ". But of course we know
intellectually what space is and what spatial relations are " really
and externally," only from the way in which things appear
spatially to our senses especially to sight and touch (active
and passive touch, including the muscular sense of motion and
resistance to muscular effort) in normal sense perception. Re
flection shows us that in the end it is really meaningless to
contend that things never reveal to us their primary qualities or
spatial relations as these are " really and externally " ; for by
what these qualities and relations are "really and externally"
we mean what they appear to us in normal sense perception, i.e.
what we judge them to be by interpreting them as thus appear
ing, through the aid of concepts derived from what they reveal
to our consciousness in sense perception. 1
Hence we are forced to disagree with Prichard when, after pronounc
ing all the secondary qualifies to be merely conscious states or " sensa
tions " (and to be by implication incapable of giving us any knowledge about
extramental reality) he goes on to contend that our sense apprehension even
of the primary qualities or spatial relations never reveals these as they are
really and externally " (and by implication that our intellectual knowledge of
what real extension, externality, space, and spatial relations are, is altogether
independent of what they appear in sense perception). On the contrary, we
do perceive (i) not only the primary qualities, but (2) the secondary qualities,
as they are really and externally ; and moreover (3) if this were not so we
could never prove against any form of idealism that the intellectual know
ledge we have of a world of data characterized by such qualities is knowledge
of a really extramental, external, spatial universe, and not merely a knowledge
of subjective mental phenomena or conscious states (125).
1 It must not be forgotten that we accumulate our knowledge of what things
are "really and externally" by using concepts derived from all the data of the
various senses. Therefore what an external thing presents in any individual act of
perception is usually only a small part of what we already know the total external
reality of the thing to be. And this knowledge is always helping us to check, and
adjust, and if necessary correct, " what the thing appears " in any individual per
ceptive act whose object we are interpreting : it is constantly guarding us from
erroneous and hasty spontaneous interpretations. Cf. supra, 127, pp. 162, n. i ;
166, n.
- Cf. supra, 125, pp. 144 sqq.
1 74 THEOR Y OF KNO WLEDGE
(i) Prichard s own analysis of the convergence of the railway lines
proves that " in limiting cases " we visually apprehend spatial relations as
these are " really and externally ". But what they are " really and externally,"
in respect of spatial relations, we can know only by intellectual interpretation
of what they appear in normal perception to all the senses which reveal " ex-
tensity," " externality," " voluminousness," especially to the senses of sight
and touch. Prichard, however, holding that our intellectual knowledge of what
things are spatially is independent of perception and always represents them
otherwise than as they look in perception, goes on to contend that even in the
limiting cases referred to " what a thing looks and what it is " are after all not
" identical "- 1 The reason he gives is plausible but not convincing : it is
that all such limiting cases refer only to two dimensions of space, " e.g. con
vergence and bentness,"- whereas real spatial relations are always thrce-
dimensional, so that what a thing appears spatially to sight can never be
identical with what it really is spatially. Now, even if we grant that sight
alone can apprehend only two-dimensional extension," it would follow merely
that what a spatial thing appears to sight is not the whole of what it really
is spatially ; but surely it would not follow that what the thing appears spatially
to sight cannot be a real part or ftmction of its total spatial reality. " It is
obvious," says Prichard, 4 " that two dimensions are only an abstraction from
three, and that the spatial relations of bodies, considered fully, involve three
dimensions." Of course ; but because the two dimensions are only abstrac
tions, are they on that account not real ? Are the two dimensions, perceived
by sight in the spatial things, not really in the latter ? They certainly are.
" A body may be cylindrical, and we may see a cylindrical body ; but such
a body can never, strictly speaking, look cylindrical." 5 It can never look
cylindrical to sight alone, because of the conditions of perspective ; but it can
look what our knowledge of the real spatial shape of a cylindrical body tells
us that it ought to look in such conditions. And how do we know the real
spatial shape of a cylindrical body, or that any body is really and externally
cylindrical, unless by interpreting what it appears to sight and touch in
normal conditions ? From the fact that real spatial relations are three-
dimensional Prichard infers " that terms which fully state spatial character
istics can never express what things look, but only what they are ". B The
inference is quite too sweeping. Such terms can never express what things
look to sight in any individual perception, or what they appear to touch in
any individual tactile or muscular or motor perception ; but such terms can
and do express (our intellectual interpretation of) what things appear to us in
all our various normal visual, tactile and other " extension-revealing " per
ceptions : for this is precisely what such terms do express to us about things
by expressing " what they are ". How otherwise could we know what things
are " really and externally " in respect of spatial relations ? It is by "judging
from what it looks under various conditions," 7 and in no other possible way,
that we know intellectually whatever we do know about the spatial qualities
1 Op. cit., p. 90. - Ibid.
* Binocular vision would appear to give us at least a rudimentary visual con
sciousness of objects in relief, i.e. of the third dimension of space. Possibly,
however, such consciousness is not independent of muscular sense data.
*Ibid. 5 P. 91. *Ibid. 7 P. 99. Cf. supra, 125, p. 149.
IDEALISM ON "APPEARANCE" AND "REALITY" 175
and relations which a body has really and externally. And these spatial
qualities which we judge to be in the body " really and externally " we judge
to be there not only " independently of all perception," l but independently of
all conception, thought, judgment, as well. But to say that they are there in
dependently of perception and thought is very different from saying that we
can reach knowledge of them by thought independently of perception ; for
their reality cannot be known unless by coming into relation with sense, and
through sense with intellect : and that they can be known to be there really
and externally and independently of perception and thought, means simply
that by rejection on our cognitive processes we can see that their relation to
sense and intellect does not transform their presentation to sense or falsify
their representation by intellect.
(2) The secondary qualities likewise are perceived in normal conditions
of perception " as they are really and externally ". The distinction can like
wise be drawn between what they "appear " in any individual act of percep
tion, and what they are known to be "really and externally," i.e. what they
are known to be by "judging from what " they look "under various [normal]
conditions ". 2 Of course the distinction between what things look or appear
and what they are is of most frequent occurrence in reference to spatial
qualities as apprehended by sight. But it is also drawn in reference to
colour. Arguing against the externality of colour, Prichard refers to the
difficulty of determining " the right colour of individual bodies " as "insuper
able " ; and he concludes that they have no colour, that " colour is not a
quality of bodies ". 3 But even if colours were mere " mental facts " or " sensa
tions " we should have to recognize the distinction between " right " and
" wrong " colour-sensations ; and if the cause of the distinction be not extra-
mental* (whether organic or extra-organic), the distinction is inexplicable.
Colour is, however, a real quality of external bodies. What a colour appears
in any individual act of perception depends partly on organic conditions :
hence the phenomenon of colour blindness. But even in normal organic con
ditions there is the further consideration that the same body seen from differ
ent standpoints " presents " different colours. This, however, only proves that
it has these colours simultaneously, that it reflects different " light vibrations "
in different directions.
So, too, in regard to the other secondary qualities. It is possible to draw
a distinction between " what they appear" in any individual act of sense per
ception and " what they are really and externally " ; this latter meaning
what they are known to appear in normal conditions of perception. 5 It may
indeed be " difficult and, in the end, impossible to say that a bell appears
noisy " ; 6 but we can and do rightly say, " the pitch of the whistle from the
approaching train appears to grow higher, but I know it really remains the
same," 7 or again, " I seem to hear a humming noise around me, but I know
1 Op. cit., p. 99. Cf. supra, 125, p. 149.
2 P- 99- 3 P. 87. i Cf. supra, 125.
5 Relativity to normal organic factors being tacitly understood not to falsify the
interpretation of what they are extra-organically or "externally". Cf. supra,
122.
6 Op. cit., p. 86.
7 Cf. " The railway lines only appear convergent, but I know they are really
parallel ".
1 76 THEOR Y OF KNO W LEDGE
there is really no noise but only an organic affection of the ear ". Similarly,
it is not impossible to say that " sugar appears sweet V No doubt, the
usual expression is " sugar tastes sweet " ; which is another way of saying
that "sugar appears sweet to normal perceivers," which again, intellectually
interpreted, means " sugar is sweet ". But a person whose sense of taste
is, from whatsoever cause, abnormal, can and does rightly say, " this sugar
only tastes or appears bitter to me, but I know it is really not bitter but
sweet ". Similar instances may be discovered in sensations of temperature,
touch, and smell. And the implication of the distinction is the same through
out : in no case does it imply that what we perceive is only a " mental state,"
whether we call this a " sensation " or an " appearance " ; but in all cases it
implies (a) that what appears in any and every act of sense perception " is
extramental reality ; (b) that what this extramental reality appears in the
individual perception is partly dependent on subjective, organic factors, and
on extra-organic or external conditions ; (c) that what it appears will differ
from what it is if those factors are abnormal ; inasmuch as (d) by what it is
(in so far as we know what it is) we mean the knowledge we have of it by
interpreting what it appears in normal conditions of perception.
(3) Finally this latter knowledge is as far as it goes knowledge of an
extramental universe as it is extramentally, because cognitive relation of the
latter to the mind, whether in perception or in conception, does not transform
or alter it by the projection into it of any subjective mental factors. Further
more it is knowledge of an external, spatial (and otherwise physically "quali
tative ") universe as it is externally, because its cognitive relation to the
perceiving subject as organic can be known by intellect reflecting on the pro
cess of perception ; can be discovered to be normal or abnormal as the case
may be ; is understood, when known to be normal and uniform, to be included
in what we mean by real externality, and, when known to be abnormal, can
safeguard us from the error of judging that "what the thing appears " in such
circumstances is " what it is really and externally ".
On the other hand, if we held the secondary sense qualities to be " mental
states," and the primary qualities or "spatial determinations" never to be
really and extramentally what they appear, or as they are perceived, then,
since we have no other way of knowing intellectually what spatial qualities
and things are really and extramentally than by judging from what they
appear, it would inevitably follow that our supposed knowledge of what they
are really and extramentally is an illusion.
The assumption that we can have intellectual knowledge of an extra-
mental, real, spatial universe, independently of all that appears to consciousness
in sense perception, is gratuitous and erroneous. If there is such a universe,
intellectual knowledge of it is conditioned by its being cognitively related to
intellect ; and it cannot be cognitively related to intellect unless through its
cognitive relation to sense. If, then, it always appears to sense otherwise
than it is, so consequently must it appear to intellect otherwise than it is : in
J O/. cit., p. 86.
2 Including sense " illusions," i.e. misinterpreted perceptions of external things
really presented to the perceiver ; but not including hallucinations which, being
imagination processes, do not " present " any external object, though they have an
extramental, organic, ical cause.
IDEALISM ON "APPEARANCE" AND "REALITY" 177
which case all our knowledge would be illusory if understood to refer to what
reality is extramentally ; but if understood to refer to "how it appears " it
would still be possible to distinguish between " what it appears " normally and
" what it appears " in abnormal, special conditions, and to designate the
former "true knowledge," and the latter "false or illusory knowledge," of
"how reality appears". This is Kant s position. It cannot be met by argu
ing that, in the distinction between what things appear (e.g. in respect of
spatial relations) and what they are, (a) we know " what they are " irre
spectively of what they appear, or that (<5) by " what they are " we mean
" what they are but never appear " ; for neither of these contentions can be
sustained. We refute his position rather by recognizing that the distinction
between " what things appear " (in regard to spatial and other sense
qualities) and " what they are " is a distinction between what they may
appear in an individual, abnormal case, and what they are known to appear
normally ; by admitting also the possibility of confining the distinction be
tween abnormal (" Schein ") and normal (" Erscheimtng"} to " what things
appear" ; but by showing that there is no ground whatsoever for supposing
either that "what things appear" in normal perception is anything other or
otherwise than " what they are really and extramentally and externally," or
for supposing that " what they appear to intellect" i.e. what they are in
terpreted or represented to be by intellect, is a metamorphosis or transfigura
tion of what they really are, a transformation gratuitously supposed to be
effected by subjective, mental factors contributed in the process whereby
they are cognitively related to the intellect.