Our representional way of thinking

So you see this 'person' who unknown to you has emerged from a space craft sometime back
this person let us call him Barnaby has integrated  seamlessly into US society, becoming a tax lawyer, football fan, and Democratic Party activist. ##

Even if we know next to nothing about what is going on inside Barnaby's head 
it may seem natural to say that he has beliefs much like ours—that labor unions tend to support Democratic candidates. 

Perhaps we can coherently imagine that Barnaby does not manipulate sentences in a language of thought or possess internal representational structures of the right sort. Perhaps it is conceptually, even if not physically, possible that he has no complex, internal, cognitive organ, no real brain. But even if it is granted that a creature must have human-like representations in order to behave thoroughly like a human being, one might still think that it is the pattern of actual and potential behavior that is fundamental in belief—that representations are essential to belief only because, and to the extent to, they ground such a pattern.