[245] Cf. above, p. 29.

[246] A 6 ff. = B 10 ff.

[247] Prolegomena, § 2, b, c; Eng. trans, pp. 15-16. On the connection of mathematical reasoning with the principle of contradiction, cf. below, pp. 64-5.

[248] P. 582; cf. Logik, § 37.

[249] ii. p. 257.

[250] Prolegomena, § 4.

[251] Cf. B 290.

[252] § 2, c.

[253] B 161.

[254] B 218.