Note 18 — CONTENTS

(p. 12). This truth was familiar to Aristotle (cf. e.g. De Anima, iii. 8). The Middle Ages maintained it, but expressed it unfortunately in the proposition: nihil est in intelluctu, quod non prius fuerit in sensu. The notions “willing,” “concluding” are not gained from sensuous perception; the term “sensuous” would in that case have to be taken so generally that all distinction between “sensuous” and “super-sensuous” disappears. These notions have their origin in certain concrete impressions with psychical content (Anschauungen psychischen Inhalts). From the same source arise the notions “end,” “cause” (we observe, for example, a causal relation existing between our belief in the premises and in the conclusion), “impossibility” and “necessity” (we gain these from judgments which accept or reject not merely assertorically, but, as it is usually expressed, apodictically,) and many other notions which some modern philosophers, failing in detecting the true origin of them, have sought to regard as categories given à priori. I may mention, by the way, that I am well aware Sigwart and others influenced by him have recently questioned the peculiar nature of apodictic as opposed to assertorical judgments. But this is a psychological error which it is not the place to discuss here. Cf. note 27, p. 83 sub.