• Kripke will latter consider a similar question about general terms for “natural kinds.” He introduces this question (along with a third issue he will discuss later) at the beginning of this assignment on pp. 97-100.

• Kripke’s discussion of identity between names (pp. 100-110) introduces his central examples of necessary truths that are not known a priori, and it leads him to offer his main defense of the claim that such things are possible. The basic idea in this defense appears first at the top of p. 102 and is restated in important ways also on p. 104 (notice the idea of qualitatively indistinguishable evidence) and on p. 108 (notice the conditional that Kripke says is known a priori).