The `standard’ argument against conceptual atomism: primitive concepts must be innate (i.e. common ground between empiricists and rationalists). So, if conceptual atomism is true, concept nativism must be true. Is this a reduction? The main objection to a pervasive concept nativism is that typical concepts are acquired from experience with their instances. This is explicable on the assumption that such concepts are learned. An alternative explanation is proposed, which turns on the suggestion that typical concepts express mind dependent properties.
Keywords: concepts, conceptual atomism, innateness, nativism, primitive concepts, similarity