What does it mean to say that you “know” something is true? According to traditional philosophical thinking, you can be said to know that some proposition P is true if and only if: P is true. You believe that P is true. You are justified in believing that P is true. These three conditions jointly form the concept of justified true belief (JTB). As an example, let’s examine my claim that I know Paris is the capital of France. Unless an edict to the contrary has come down in the last few minutes, Paris is the capital of France, I believe that Paris is the capital of France, and I’m justified in believing that based on available evidence. So according to the concept of justified true belief, I know that Paris is the capital of France. Gettier Problems Here’s a thought experiment: Let’s say I wake up in the morning,… Read more →