Evaluates arguments and offers feedback. Type an argument, and receive an evaluation by email.

Link to a variety of philosophers, or read about the history and divisions of philosophy.

Developing online encyclopedia of philosophy, covering philosophers, terms, and systems of thought. Includes a collection of texts.

Consider the term and its uses in branches of philosophy and political theory. Includes Kant and Hegel's interpretations of the word.

Learn about the philosophical term and how it was used by the great philosophers such as Plato, Aristotle, and Marx.

Encyclopedia entry for the theory offers both philosophical and theoretical views of the idea of choosing an action.

Multimedia encyclopedia defines these two philosophical terms and relates them to one another.

Virtual encyclopedia defines the term as it applies to philosophies beginning in the Middle Ages.

Searchable database provides articles, overviews and links related to philosophers, philosophical authors, research material and journals.

Reference for philosophical terms, entered and updated regularly by experts in the field. Can be searched for specific topics.

Constantly updated publication from Stanford University features philosophers, theories, and terms.

Virtual encyclopedia of philosophy and religion complies links to pages dedicated to the study of these subjects. With brief reviews.

Browse this dictionary of cybernetics and systems for references to authors and texts.