Science (from the Latin, scientia – knowledge, knowing) is an epistemology, a way of knowing, and the discipline that incorporates it. The scientific method is a system of inductive reason, based on trial, experiment, and drawing conclusions from the “proof” of evidence. It uses mathematics, physics, chemistry, and observation to draw conclusions that lead to hypotheses, then theorems, then laws. As a method of gathering systematic understanding of the universe (especially the physical universe), the conclusions reached by the scientific method are valid only when and if they satisfy all the evidence. Other ways of knowing (belief, superstition, impression, etc. are others, not acknowledged by the scientific method) have their own validity, but science serves humanity as the primary method for determining “truth.” There are also “soft sciences” (psychology, sociology, etc.) that cannot submit to strict experimentation, because humanity is not a scientifically predictable entity.