You glance at a wall clock that reads two o'clock, it really is two o'clock, but the clock stopped exactly twelve hours ago. Did you know the time? This episode dismantles the definition of knowledge through the Gettier problem, starting with the ancient justified true belief framework, pictured as a bank vault needing three keys, and the eighth-century Indian philosopher Dharmottara's desert traveler who follows a mirage and finds real water under a rock.

The hosts then cover Edmund Gettier's three-page 1963 paper and the Smith and Jones case of ten coins, the no false premises patch and the hologram scenario that defeats it, a general recipe for generating such cases with doses of bad and good luck, Robert Nozick's truth tracking and the fake barn county that forces philosophers to abandon epistemic closure. Two extremes emerge, radical s ...