PERSON
Hilary Putnam
The philosopher who built the case for thinking machines and then, with the same rigor, spent his life dismantling it—the rare mind that appears on both sides of the debate that defines our moment.
Hilary Putnam is the only thinker who could have written both the prosecution and the defense in the trial of artificial intelligence. By his mid-thirties he was the chief architect of the idea that a mind is a kind of program—
functionalism, the thesis that the same mind could run on different hardware—and that idea is the unspoken premise behind every confident claim that
consciousness could be "substrate-independent." Then he took it apart. Watching a first-rate mind dismantle its own monument is the most useful thing a reader confronting the AI question can do, because it is exactly the discipline the question demands. When an engineer says what matters is the computation and not the meat, she speaks his early language; when a skeptic insists a system trained only on text can never truly
mean anything, he reaches for the externalism Putnam built. In the cycle that began with
[YOU] on AI—where the machine is a mirror held up