The principle that arguments, explanations, or solutions constructed for a specific purpose, without broader application, can be valid within that specific context even if they fail elsewhere. The law acknowledges that ad hoc reasoning—devised for the occasion, not generalizable—has its place. In emergency response, ad hoc solutions save lives; in scientific discovery, ad hoc hypotheses guide research; in everyday life, ad hoc explanations get us through the day. The problem arises when ad hoc validity is mistaken for general validity—when the explanation that works for this one case is treated as a universal law. The law of the ad hoc validity reminds us that context matters, and that validity is not binary but situational.
Example: "His excuse for being late—traffic, then a train, then a stray dog—was ad hoc, invented for the occasion. But it was valid ad hoc: it explained this specific lateness to this specific boss on this specific day. The law of the ad hoc validity said: it works for this case; don't try to generalize it. His boss accepted it, which was all that mattered."
by Dumu The Void February 17, 2026
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