Bryan: Calling the mind a computer is just a metaphor – and using metaphors to infer literal truths about the world is a fallacy. Me: I’m saying that your mind is literally a signal processing system. … While minds have a great many features, a powerful theory, in fact our standard theory, to explain the mix of features we see associated with minds, is that minds fundamentally function to process signals, and that brains are the physical devices that achieve that function.