# Justified True Belief

• According to Plato, true belief is not enough for knowledge
• It must be justified
• Person who is justified is in a position to speak to objections of their belief
• A lucky guesser will have more trouble defending their belief
• In order for something to be true, one must not only believe the relevant true proposition, but also have justification for doing so
• $S$ knows that $P$ if any only if:
• $P$ is true
• $S$ believes that $P$ is true
• $S$ is justified in believing that $P$ is true

Philosophy