[67] The Critical Philosophy of Kant, Vol. I. p. 287.
[68] For a discussion of Kant from a less purely mathematical standpoint, see Chap. IV.
[69] Cf. Vaihinger's Commentar, II. pp. 202, 265. Also p. 336 ff.
[70] E.g. second edition, p. 39: "So werden auch alle geometrischen Grundsätze, z. B. dass in einem Triangel zwei Seiten zusammen grösser sind als die dritte, niemals aus allgemeinen Begriffen von Linie und Triangel, sondern aus der Anschauung, und zwar à priori mit apodiktischer Gewissheit abgeleitet."
[71] Cf. Bradley's Logic, Bk. III. Pt. I. Chap. VI.; Bosanquet's Logic, Bk. I. Chap. I. pp. 97–103.
[72] Philosophie de la Règle et du Compas, Année Philosophique, II. pp. 1–66.
[73] I have stated this doctrine dogmatically, as a proof would require a whole treatise on Logic. I accept the proofs offered by Bradley and Bosanquet, to which the reader is referred.
[74] For a further discussion of this point, see [Chaps. III.] and [IV.]
[75] See [Chap. IV.] for a discussion of this argument.