[455] Cf. below, p. 117. ff.
[456] Cf. conclusion of fourth argument on space.
[457] A priori is here employed in its ambiguous double sense, as a priori in so far as it precedes experience (as a representation), and in so far as it is valid independently of experience (as a proposition). Cf. Vaihinger, ii. p. 268.
[458] Cf. below, p. 114 ff.
[459] Cf. below, pp. 115-16.
[460] Cf. Lose Blätter, i. p. 18: “This is a proof (Beweis) that space is a subjective condition. For its propositions are synthetic and through them objects can be known a priori. This would be impossible if space were not a subjective condition of the representation of these objects.” Cf. Reflexionen, ii. p. 396, in which this direct proof of the ideality of space is distinguished from the indirect proof by means of the antinomies.
[461] By “concepts” Kant seems to mean the five arguments, though as a matter of fact other conclusions and presuppositions are taken into account, and quite new points are raised.
[462] This, according to Vaihinger (ii. p. 287), is the first occurrence of the phrase Dinge an sich in Kant’s writings.
[463] Cf. Vaihinger’s analysis of this discussion, ii. pp. 290-313.
[464] ii. pp. 289-90.