CONCEPT
The Grammar of Assent
Newman's account of the structural principles governing the legitimate passage from probability to certitude in concrete matters — a grammar operating by the convergence of independent probabilities weighed by the illative sense.
The Grammar of Assent was Newman's 1870 attempt to describe, with philosophical rigor, how real people actually reach certitude in matters that resist formal demonstration. Against the empiricist tradition that held conviction should be proportioned to evidence, Newman argued that concrete certitude is reached through the convergence of independent probabilities — none sufficient alone, together compelling — assessed by the trained judgment of the individual reasoner. The process is rational but not formally demonstrative; personal but not arbitrary; rigorous without being reducible to rules. In the AI age, the grammar of assent stands in sharp contrast to what can be called the grammar of the prompt — the emerging discipline of framing questions to a machine in ways that produce useful outputs. The two grammars are structurally different, and the confusion between them is, in Newman's terms, the characteristic intellectual pathology of the present moment.
In The You On AI Field Guide
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