In analytic philosophy, the paradigm case argument (PCA) is an argument which is applied as a rebuttal to the claim that certain concepts, such as free will or knowledge are meaningless. The paradigm case argument is that if a term, such as "knowledge", is regularly applied to some cases and not to others, then that term (and the concept it refers to) cannot truly be undefined, as it clearly has some kind of definition in practice.
In analytic philosophy, the paradigm case argument (PCA) is an argument which is applied as a rebuttal to the claim that certain concepts, such as free will or knowledge are meaningless. The paradigm case argument is that if a term, such as "knowledge", is regularly applied to some cases and not to others, then that term (and the concept it refers to) cannot truly be undefined, as it clearly has some kind of definition in practice.
Source: Wikipedia "Paradigm case argument" · CC BY-SA 4.0
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