 The view that concepts are Fregean senses, like the abilities view, is generally held by philosophers who are opposed to identifying concepts with mental representations. Peacocke himself doesn’t go so far as to argue that mental representations are explanatorily idle, but he does think that mental representations are too fine-grained for philosophical purposes. “It is possible for one and the same concept to receive different mental representations in different individuals” (Peacocke 1992, p. 3). He is also concerned that identifying concepts with mental representations rules out the possibility of there being concepts that human beings have never entertained, or couldn’t ever entertain.