Offers an expansive, unified theory of thought that brings together the vast resources of neuroscience, computation, and cognitive linguistics.What is an idea, and where does it come from? We experience thought as if it were abstract, but every thought is actually a physical thing, carried out by the neural systems of our brains. Thought does not occur neuron-by-neuron; it happens when neurons come together to form circuits and when simple circuits combine to form c...