Logic / Logic 094 · Atom · ~20 seconds
Mood and Figure
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Mood is the three-letter sequence of statement forms; figure (1–4) is the middle term's position. Together they name all 256 possible syllogisms.
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All M are P; All S are M; ∴ All S are P — mood AAA, figure 1. The medievals called it Barbara.
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Of the 256, only 15 are valid on the Boolean reading. Naming forms is how you look violations up.