n of the
duality of the points of a pair of compasses, which seem one to the
tactual sense.

[157] I might further remark that this "collective experience" includes
previously detected illusions of ourselves and of others.

[158] M. Taine frankly teaches that what is commonly called accurate
perception is a "true hallucination" (_De l'Intelligence_, 2ieme partie,
Livre I. ch. i. sec. 3).

[159] It only seems to do so, apart from philosophic assumptions, in
certain cases where experience testifies to a uniform untrustworthiness
of the origin. For example, we may, on grounds of matter of fact and
experience, be disposed to distrust any belief that we recognize as
springing from an emotional source, from the mind's feelings and wishes.

I may add that a so-called intuitive belief may refer to a matter of
fact which can be tested by the facts of experience and by scientific
methods. Thus, for example, the old and now exploded form of the
doctrine of innate ideas, which declared that children were born with
certain ideas ready made, might be tested by observation of childhood,
and reasoning from its general intellectual condition. The same applies
to the physiological theories of space-perception, supposed to be based
on Kant's doctrine, put forward in Germany by Johannes Mueller and the
"nativistic school." (See my exposition and criticism of these doctrines
in _Mind_, April, 1878, pp. 168-178 and 193-195.)

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