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648 with what has been obtained from the studies on the physical side, and this should lead to an emphasis of the former, in our time at least: and it seems to me clear that the balance will be always in favor of introspection; that it is the final reference to which all psycho-physical result must be made now and always. The rapid development and the brilliant and valuable results obtained from this new science of psycho-physics have, however, led, if not to a disregard of introspective evidence, at least to an over-emphasis of the data from neurology. The sensational hypothesis as to pleasure and pain under discussion appears to me to be eminently a case in point. The evidence produced in favor of this hypothesis is almost altogether physiological and anatomical, and furthermore, in my opinion, is in itself not at all of such nature as should lead a truly scientific mind to adopt the hypothesis without reserve. It does not seem to me that it would have been possible for psychologists to have maintained it had they as scientists taken into full consideration the data from subjective psychology proper which bear on the question.

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