 A further worry about the Argument from Design concerns the gap between its conclusion (the claim that the mind is massively modular in organization) and the hypothesis at issue (the claim that the mind is massively modular simpliciter). The worry is this. According to Carruthers, the modularity of a system implies the possession of just two properties: functional dissociability and inaccessibility of processing to external monitoring. Suppose that a system is massively modular in organization. It follows from the definition of modular organization that the components of the system are functionally autonomous and separately modifiable. Though functional autonomy guarantees dissociability, it’s not clear why separate modifiability guarantees inaccessibility to external monitoring. According to Carruthers, the reason is that “if the internal operations of a system (e.g., the details of the algorithm being executed) were available elsewhere, then they couldn’t be altered without some corresponding alteration being made in the system to which they are accessible” (Carruthers, 2006, p. 61). But this is a questionable assumption. On the contrary, it seems plausible that the internal operations of one system could be accessible to a second system in virtue of a monitoring mechanism that functions the same way regardless of the details of the processing being monitored. At a minimum, the claim that separate modifiability entails inaccessibility to external monitoring calls for more justification than Carruthers offers. 