In logic, a syllogistic mood in the third figure where the major premise is universal affirmative, the minor is universal negative, and the conclusion is particular negative.
From Medieval Latin, constructed similarly to 'ferio' as part of the systematic naming of logical moods. The suffix structure follows the pattern established by medieval logicians naming the valid argument forms.
While formal logic isn't common anymore, the medieval invention of these Latin names for logical patterns represents one of humanity's first attempts to create a systematic code for thinking itself!
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