In this paper I seek to defend an epistemology that does not confine itself to the knowledge of propositions. The first section motivates this move, especially from the standpoint of the philosophy of science. The second section presents the notion of operational coherence as the key to understanding how knowledge resides in activities. The third section presents a proposal for making sense of truth on the basis of operational coherence. The final section briefly reconsiders the relation between knowledge-as-ability and knowledge-as-information.