 This style of account, together with the Fregean thesis that “sense determines reference”, and the history of criticisms both have elicited, provide a significant part of the background of contemporary discussions of mental content. It is often assumed, with Frege, that we must recognize that thoughts or contents cannot consist in images or essentially private “ideas”. But philosophers have frequently criticized Frege’s view of thought as some abstract entity “grasped” or “present to” the mind, and have wanted to replace Frege’s unanalyzed grasping of abstract entities with something more “naturalistic”, or at any rate more explanatory of what is involved in thinking.