- Immanuel Kant
- René Descartes
- David Hume
- Baruch Spinoza
- Georg Wilhelm Friedrich Hegel
- Martin Heidegger
- Blaise Pascal
- Ludwig Wittgenstein
- George Berkeley
- Stephen W. Kress
- Erasmus
- Francis Bacon
- Hélène A. Guerber
- Eric Fein
- Kip S. Thorne
- Maimonides
- Joseph Mazur
- W.K.C. Guthrie
- Eliot Deutsch
- Seymour Feldman





























