ABSTRACT
According to the Knowledge from Knowledge (KFK) principle, inferences that begin from states other than knowledge and end with knowledge of a conclusion are not possible – that is, vaults-to-knowledge are not possible. But what about other kinds of epistemic vaults? Can they show up in human reasoning? They would involve an inference which ends in a conclusion-belief that falls short of knowledge, though that conclusion-belief would be one step closer to being a knowledge state than the state from which it was inferred. Call these vaults-to-sub-knowledge. And what about sequences of vaults of these kinds, meaning episodes of extended reasoning in which a succession of two or more inferences are made, each of which involves a different kind of vault? Call these extended vaults. How many vaults, and what kinds of vaults, can show up in an extended vault that ends with a vault-to-knowledge? What about for extended vaults that end with a vault-to-sub-knowledge? This chapter does two things: first, it offers reasons to think that this taxonomical work is important; then it provides a taxonomy of candidate vaults-to-knowledge, candidate vaults-to-sub-knowledge, and candidate extended vaults.
