Although psychological evidence counts against the classical account of concepts as strictly
definable, it does not suffice to enable us to choose definitively among prototype, exemplar,
knowledge, and multimodal theories.But I see no reason to take these as competing views; rather I
prefer to interpret them as capturing various aspects of how concepts are represented in the brain.
Some concepts like mathematical ones may even be definable. In chapter 3 I suggested that concepts
and other mental representations are patterns of neural activity. What I need to show now is that the
brain-based view of concepts can support all these diverse aspects of concepts.