Are human beings born completely empty, with no instincts or preloaded traits, so that everything we know and fear comes from experience alone? This episode traces the idea of tabula rasa from its literal origin as a scraped Roman wax tablet through Aristotle’s unscribed tablet, the Stoic wax metaphor, Ibn Sina’s empirical abstraction and Ibn Tufail’s feral-child novel Hayy ibn Yaqzan, then into Aquinas, John Locke’s white paper and the political revolution that followed when blankness came to mean equality and natural rights.

The conversation then turns to the science that pushed back: neurobiology showing a cortex organized from birth, Chomsky’s universal grammar, behavioral genetics on IQ and addiction, and a 4D ultrasound study of twin fetuses that found intentional social movements toward a co-twin from the fourteenth week of gestation. Finally the blank slate finds a new home in artificial intelligence, where DeepMind’s AlphaZero mastered chess, shogi and Go with no human games at all, raising the question of whether a truly blank slate is even possible when someone had to build the table.

• Why the Latin phrase means scraped tablet and how Romans erased wax with heat and a stylus
• How Locke’s empiricism undermined the divine right of kings and grounded natural rights
• Hobbes and Freud as the pessimistic and parental-imprinting alternatives to Locke
• The social pre-wiring hypothesis and kinematic analysis of decelerating fetal hand movements
• Tabula rasa reinforcement learning in AlphaZero versus Deep Blue’s hard-coded grandmaster libraries