It is widely thought that philosophical behaviorism is an untenable and outdated theory of mind. It is generally agreed, in particular, that the view generates a vicious circularity problem. There is a standard solution to this problem for functionalism, which utilizes the formulation of Ramsey sentences. I will show that this solution is also available for behaviorism if we allow quantification over the causal bases of behavioral dispositions. Then I will suggest that behaviorism differs from functionalism mainly in its commitment to anti-representationalism, and I will offer two new objections to anti-representationalism. The first will be based on considerations concerning the contents of desires and intentions. The second objection conc...