Can virtual reality make people more empathetic, train students in the scientific method, and help people overcome their fears? This week’s episode asks whether VR is a force for good, a force for ill, or not much of a force at all.

When people talk about knowledge they usually mean what philosophers call “propositional knowledge”—knowledge of facts that can be articulated in language. But music can provide another kind of knowledge that cannot be expressed in language. It can provide experiential knowledge.