 Among the practical aims of Wolff’s philosophy is outfitting the mind with the tools it needs to pursue and attain properly scientific knowledge, in contrast with “common” or “vulgar” knowledge, or as Wolff sometimes says “the natural way of thinking”. If certain groups of facts can be shown to follow from “well-grounded” assumptions according to strict requirements of demonstration, the class of facts is deemed by Wolff to constitute a “science”. Wolff gives several definitions of the term science: