CONCEPT
Wallace’s Exception
The argument from incredulity applied to a blind optimization process—the inference from “I cannot see how this mechanism could produce that result” to “therefore something beyond the mechanism must be involved,” which Alfred Russel Wallace made about natural selection and the human mind, and which the AI age makes about next-token prediction and reasoning.
In April of 1869,
Alfred Russel Wallace announced that natural selection could explain the whole of the living world except one thing: the human mind. A brain built under survival pressure, he argued, should be only slightly superior to an ape’s; but the human brain could do mathematics, compose music, and reason abstractly—capacities that the environments of “savage man” never demanded and therefore selection could never have built. He was pointing at a genuine gap: the mismatch between a narrow optimization pressure and the rich latent capabilities it happened to produce. And he was drawing the wrong inference from it. The gap was real; what he called for as an explanation was an “Overruling Intelligence” that had guided human evolution toward philosophical capacity—a conclusion Darwin rejected with the force of three underlined “No!”s in the manuscript margin. The resolution, supplied by a