[20] In order to meet a possible objection, it may be pointed out that if AB and BC be given in isolation, the contiguity implied in referring to them as AB and BC will not be known.
[21] Cf. pp. 27-9.
[22] I can attach no meaning to Mr. Bertrand Russell's assertion that relations have no instances. See The Principles of Mathematics, § 55.
[23] Cf. p. 217.
[24] Cf. p. 180, and pp. 280-3.
[25] Cf. p. 137 init.
[26] The absurdity of the problem really propounded is also concealed from Kant in the way indicated, pp. 180 fin.-181 init.
[27] Vorgestellt.
[28] Cf. p. 123.
[29] B. 162, M. 99.