We argue that although art has no systematic conventions for conveying knowledge in the way science does, the arts often play an important epistemic role in the production and understanding of scientific knowledge. We argue for what we call weak scientific cognitivism, the view that the production and distribution of scientific knowledge can benefit from engagement with art. We present a range of cases that illustrate a variety of epistemic functions of art relevant to scientific practice, and respond to influential (...) objections from anti-cognitivists that purport to show that art has no epistemic value. (shrink)