Anything that cannot be observed, abstract or abstruse philosophy much of what Descartes focuses on, Hume classifies as metaphysics and believes them to be fictions. Hume wants to move metaphysics away from fictions and bring them to understanding which needs to look upon itself prior experiences. Hume’s argument how is it possible if at all a human understanding to make predictable inferences without cause and effect. Cause and effect allow the mind to move from one thought to another. When these laws of association are led by custom/habit they form innate ideas. Hume thinks that our knowledge of causation should be formed by instinct rather than by reason. It is very important that we see the world through experiences because reason is too unreliable a tool. The instincts enforced by custom are far less susceptible to error, and are