[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.