At its simplest, philosophy (from the Greek phílosophía or philosophia, meaning "the love of wisdom") is the study of knowledge, or "thinking about thinking", although the breadth of what it covers is perhaps best illustrated by a selection of other alternative definitions. Philosophical questions (unlike those of the sciences) are usually foundational and abstract in nature. Philosophy is done primarily through reflection and does not tend to rely on experiment, although the methods used to study it may be analogous to those used in the study of the natural sciences.

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