Socrates (470-399 B.C.) – a renowned Greek philosopher from Athens who taught Plato. Plato taught Aristotle and Aristotle taught Alexander the Great. Socrates used a method of teaching by asking leading questions. The Greeks called this form dialectic – starting from a thesis or question, then discussing ideas and moving back and forth between points of view to determine how well ideas stand up to critical review, with the ultimate principle of the dialogue being Veritas – Truth.