(Or declarative knowledge) Knowledge that some proposition is either true or false. This distinguishes propositional knowledge from know-how or procedural knowledge, which is the knowledge of how to perform some task. This article discusses propositional knowledge from a variety of perspectives, including philosophy, science, and history.

What is the difference between knowledge and beliefs? A belief is an internal thought or memory which exists in one’s mind. Most people accept that for a belief to be knowledge it must be, at least, true and justified. The Gettier problem in philosophy is the question of whether there are any other requirements before a belief can be accepted as knowledge.