PERSON
Charles Sanders Peirce
The American logician and founder of pragmatism who, in 1887, posed the AI question a century before anyone else did—asking precisely how much of thinking a machine could perform and what part must remain with the living mind—and whose tripartite logic of inference still provides the sharpest available instrument for answering it.
Charles Sanders Peirce is the philosopher who asked the right question before the technology existed to make it urgent. In 1887, examining the mechanical logic devices of his former student Allan Marquand, he sketched the first known design for electronic logic gates in a letter and posed, in an essay called "Logical Machines," the question that defines the present moment: “how much of the business of thinking a machine could possibly be made to perform, and what part of it must be left for the living mind.” His answer rested on a distinction he considered his most original contribution to logic: the tripartite division of inference into
deduction,
induction, and
abduction. Deduction is mechanizable because its output is determined by its input. Induction is mechanizable, and contemporary AI performs it at scales Peirce could not have imagined. Abduction—the logic of discovery,