Chomsky tried to define the components of the essential tool kit of language — the kinds of mental machinery that allow human language to happen. Where counterexamples have been found, some Chomsky defenders have responded that just because a language lacks a certain tool — recursion, for example — does not mean that it is not in the tool kit. In the same way, just because a culture lacks salt to season food does not mean salty is not in its basic taste repertoire. Unfortunately, this line of reasoning makes Chomsky’s proposals difficult to test in practice, and in places they verge on the unfalsifiable.