As cazy as it sounds, Kant believes the basis of all knowledge is synthetic a priori. Aren’t we taught all academic knowledge in school and all other knowledge by observation? Kant seems to think that teachers almost serve as guides and that they help bring out the knowledge that you already have. Kant also argues that natural sciences, namely physics, are synthetic a priori. However, I must bring up how Hume points out the pool ball example, which contradicts this statement. Hume claims we do not know a priorily which angle the ball will move at until we observe the action, thus deeming this knowledge to be synthetic a posteriori.