Solar got cheaper than Kurzweil dared predict. Then AI broke the demand-side story.
Ray Kurzweil’s 2005 answer to his critics rested on reversible computing, algorithmic progress, and the claim that complex software isn’t brittle. Twenty years later, the silicon held up. The software part did not.
Frontier and Hala Point already exceed the computing capacity Kurzweil predicted for human-brain emulation by the mid-2020s. Almost every architectural detail he attached to the prediction was wrong.
Intel built an owl-scale neuromorphic box, MICrONS mapped a cubic millimeter of mouse cortex, and the Human Brain Project wrapped. Kurzweil’s 2020s whole-brain deadline did not survive the decade.
Kurzweil bet that reverse-engineering the brain was the road to AGI. The intelligence arrived on a different road — and it runs on a learning rule he called biologically unrealistic.
Kurzweil’s 2005 proof-of-concept examples for AI diagnostics had a 50% mortality rate at the exemplar level — and 100% survival at the thesis level.
Kurzweil nailed the BCI side of restoring movement. He was wrong about what would actually do the moving.
Kurzweil predicted in 2005 that stem-cell restrictions would accelerate transdifferentiation. A year later, Yamanaka did exactly that. Here is what the rest of his regulation thesis got right — and what 2025 is quietly rewriting.
Kurzweil in 2005 picked torcetrapib and Apo-A-I Milano as his evidence that atherosclerosis reversal was imminent. Both failed. The drugs that actually regressed plaque came from mechanisms his book did not name.