The tripartite definition of knowledge states that propositional knowledge , i.e. knowledge that p , has three individually necessary and jointly sufficient conditions: justification, truth and belief. In short, propositional knowledge is justified true belief. The belief condition requires that anyone who knows that p believe that p. The truth condition requires that any known proposition be true. And the justification condition requires that any known proposition be adequately justified, warranted or evidentially supported.   Reason The power…