Hume’s Triumph!

Einstein’s General Relativity (1915)
–Space is gravitationally “curved”
–So Euclid’s axioms probably aren’t true, and they’re certainly not knowable a priori.

Quantum Mechanics (1925)
–Fundamental particles don’t work at all as we (or Newton) would have expected: their behaviour is describable, but not “intelligible”.
–Randomness seems to be ubiquitous (though this would surprise both Hume and Kant!).