An initial question about this programme relates to its scope. It is by no means clear that all, or indeed any, philosophically interesting concepts can be subject to the relevant kind of analysis. Jackson himself assumes that pretty much all everyday concepts can be analysed as equivalent to “the kind which satisfies such-and-such folk assumptions”.[11]  But it is arguable that many everyday concepts are not so constituted, but rather have their semantic contents fixed by observational, causal or historical relations to their referents.