 So, Fodor’s idea is that the additional factors whose existence is required by the exclusive cp-clause cannot be completely specified within the conceptual resources of the special sciences, although this could be done (at least in principle) within the vocabulary of some more fundamental science such as neurophysiology or, ultimately, fundamental physics. Fodor calls the missing factors ‘completers’. A physical microdescription of the antecedent condition \(A\) is called a realizer of \(A\) (the same \(A\) may have several different realizers).