| 1. |
The middle term must be distributed at least once.
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| 2. |
If a term is distributed in the CONCLUSION, then it must be distributed in a premise.
error in the predicate is the fallacy of the undistributed major. |
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| 3. |
Two negative premises are not allowed.
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| 4. |
A negative premise requires a negative conclusion; and conversely.
error is the fallacy of drawing a negative conclusion from affirmative premises. |
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| 5. |
If both premises are universal, then the conclusion must be universal.
(Holds for arguments based on modern logic, and for Aristotlean arguments concerning nonexistent things.)
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