A Fortiori Argument
The Latin phrase argumentum a fortiori denotes "argument 'from stronger '." For example, if it has been established that a person is deceased, then one can, with equal or greater certainty, argue that the person is not breathing.
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Famous quotes containing the word argument:
“Our argument ... will result, not upon logic by itself—though without logic we should never have got to this point—but upon the fortunate contingent fact that people who would take this logically possible view, after they had really imagined themselves in the other man’s position, are extremely rare.”
—Richard M. Hare (b. 1919)