Now, if one accepts (i), then the problem of induction reveals two (related) problems: (a) one concerns the connection among sensible qualities, and (b) the other concerns the connection between hidden qualities and the visible qualities. So, if one accepts (i), one might have thought, for example, that routinely (if not exception-less) conjoined sensible qualities must always presuppose the same combination of hidden/invisible qualities that produce them. So, one could solve the problem associa