more from Keith Devlin

Single Idea 8075

[catalogued under 5. Theory of Logic / L. Paradox / 4. Paradoxes in Logic / a. Achilles paradox]

Full Idea

The arrow paradox starts with the assumption that space and time are atomic; the tortoise starts with the opposite assumption that space and time are infinitely divisible.

Gist of Idea

Space and time are atomic in the arrow, and divisible in the tortoise


Keith Devlin (Goodbye Descartes [1997], Ch. 2)

Book Reference

Devlin,Keith: 'Goodbye Descartes: the end of logic' [Wiley 1997], p.24

A Reaction

Aquinas similarly covers all options (the cosmos has a beginning, or no beginning). The nature of movement in a space which involves quantum leaps remains metaphysically puzzling. Where is a particle at half of the Planck time?