Demonstrative deductive mathematics originated with Pythagoras and mysticism

Evidence

Mathematics, in the sense of demonstrative deductive argument, begins with him, and in him is intimately connected with a peculiar form of mysticism. — Bertrand Russell, History of Western Philosophy, 177

Categorization

• corroborated: 2 independent passages support this claim — Bertrand Russell, History of Western Philosophy, 177
• XREF: connects to: Plato erroneously assimilated all forms of knowledge into mathematics — Bertrand Russell, History of Western Philosophy, 718; Pythagorean cosmology provided the conceptual leap toward the Copernican hypothesis. — Bertrand Russell, History of Western Philosophy, 900; Mathematical certainty led philosophers to suppose thought is superior to sense — Bertrand Russell, History of Western Philosophy, 203 (+4 more)

Broader Connections

• Parmenides invented metaphysics based on logic that influenced subsequent philosophy #expands (0.50) — Bertrand Russell, History of Western Philosophy, 275