 Partly in response to epiphenomenalist worries, some authors recommend that we replace FSC with an alternative semantic conception of computation (Block 1990; Burge 2010: 95–101; Figdor 2009; O’Brien &amp; Opie 2006; Peacocke 1994, 1999; Rescorla 2012a). Semantic computationalists claim that computational transitions are sometimes sensitive to semantic properties, perhaps in addition to syntactic properties. More specifically, semantic computationalists insist that mental computation is sometimes sensitive to semantics. Thus, they reject any suggestion that the mind is a “syntactic engine” or that mental computation is sensitive only to formal  syntax.[6]  To illustrate, consider Mentalese conjunction. This mental symbol expresses the truth-table for conjunction. According to semantic computationalists, the symbol’s meaning is relevant (both causally and explanatorily) to mechanical operations over it. That the symbol expresses the truth-table for conjunction rather than, say, disjunction influences the course of computation. We should therefore reject any suggestion that mental computation is sensitive to the symbol’s syntactic properties rather than its semantic properties. The claim is not that mental computation explicitly represents semantic properties of mental symbols. All parties agree that, in general, it does not. There is no homunculus inside your head interpreting your mental language. The claim is rather that semantic properties influence how mental computation proceeds. (Compare: the momentum of a baseball thrown at a window causally influences whether the window breaks, even though the window does not explicitly represent the baseball’s momentum.)