id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-4297		Concept - Wikipedia			.html	text/html	5455	646	59	They play an important role in all aspects of cognition.[1][2] As such, concepts are studied by several disciplines, such as linguistics, psychology, and philosophy, and these disciplines are interested in the logical and psychological structure of concepts, and how they are put together to form thoughts and sentences. Concepts are used as formal tools or models in mathematics, computer science, databases and artificial intelligence where they are sometimes called classes, schema or categories. In a physicalist theory of mind, a concept is a mental representation, which the brain uses to denote a class of things in the world. In this view, concepts are abstract objects of a category out of a human's mind rather than some mental representations. Study of concepts and conceptual structure falls into the disciplines of linguistics, philosophy, psychology, and cognitive science.[9] Notable theories on the structure of concepts[edit] "Classical Theory of Concepts".	./cache/en-wikipedia-org-4297.html	./txt/en-wikipedia-org-4297.txt