Zeno's paradox
Zeno's paradox, illustrated by Achilles' racing a tortoise.
History of logic
History of logic, the history of the discipline from its origins among the ancient Greeks to the present time. There was a medieval tradition according to which the Greek philosopher Parmenides (5th century bce) invented logic while living on a rock in Egypt. The story is pure legend, but it does reflect the fact that Parmenides was the first philosopher to use an extended argument for his views rather than merely proposing a vision of...