Note 37 — Chapter III

Special attention, however, may be drawn to the fact that the term “unconscious judgment” is not metaphorical, but serves to convey in a technical sense what appears to be the precise psychology of the process. For the distinguishing element of a judgment, in its technical sense, is that it involves an element of belief. Now, as Mill remarks, “when a stone lies before me, I am conscious of certain sensations which I receive from it; but if I say that these sensations come to me from an external object which I perceive, the meaning of these words is, that receiving the sensations, I intuitively believe that an external cause of those sensations exists” (Logic, i., p. 58). In cases, such as that mentioned in the text, where the “unconscious judgment” is wrong—i.e. the perception illusory—it may, of course, be over-ridden by judgment of a higher order, and thus we do not end by believing that the bowl is a sphere. Nevertheless, so far as it is dependent on the testimony of our senses, the mind judges erroneously in perceiving the bowl as a sphere. In his work on Illusions, Mr. Sully has shown that illusions of perception arise through the mental “application of a rule, valid for the majority of cases, to an exceptional case.” In other words, an erroneous judgment is made by the non-conceptual faculties of perception—this judgment being formed upon the analogies supplied by past experience. Of course, such an act of merely perceptual inference is not a judgment, strictly so called; but it is clearly allied to judgment, and convenience is consulted by following established custom in designating it “unconscious,” “intuitive,” or “perceptual judgment.”