HEATKEYS

Comprehensive encyclopedia of mathematics with 13,000 detailed entries. Continually updated, extensively illustrated, and with interactive examples.

An overview of the areas of philosophy, from logic to metaphysics, with the views and writings of the most important philosophers throughout history.

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

Learn the fundamentals of logic, argumentation, critical reasoning and essay writing. Video tutorial courses taught by a professional philosopher. Home of the Critical Thinker Podcast.

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

How to change what others think, believe, feel and do is at the core of many professions. Here are the inner secrets of persuasion and changing other people.

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

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