Nix v. Hedden aids to the memory and understanding of the court. Gray acknowledged that botanically, tomatoes are classified as a "fruit of the vine"; nevertheless, they are seen as vegetables because they were usually eaten as a main course instead of being eaten as a dessert. In making his decision, Justice Gray mentioned another case where it had been claimed that beans were seeds — Justice Bradley, in "Robertson v. Salomon," 130 U.S. 412, 414, similarly found that though a bean is botanically a seed, in common parlance a bean is seen as a vegetable. While on the subject, Gray clarified the
A priori and a posteriori negation is not self-contradictory (thus, it is said that it is "not" true in every possible world). As Jason Baehr states, it seems plausible that all necessary propositions are known "a priori", because "[s]ense experience can tell us only about the actual world and hence about what is the case; it can say nothing about what must or must not be the case." Following Kant, some philosophers have considered the relationship between aprioricity, analyticity, and necessity to be extremely close. According to Jerry Fodor, "Positivism, in particular, took it for granted that "a priori" truths must be necessary..." However, since