 As we have seen, functionalism helps with (a). Moreover, COMP provides a blueprint for tackling (b). We can first delineate a compositional semantics describing how S’s meaning depends upon semantic properties of its component words and upon the compositional import of the constituency structure into which those words are arranged. We can then explain in naturalistically acceptable terms why the component words have the semantic properties that they have and why the constituency structure has the compositional import that it has.