Aristotle's Six Rules
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1. A syllogism must have...
three and only three terms.
2. A syllogism must have...
three and only three propositions.
3. The middle term must be...
distributed at least once.
4. No term that is undistributed in the premise may be __________ in the conclusion.
5. No syllogism can have ___ negative premises.
6. If one premise is negative, the conclusion must be ________; if the conclusion is ________, one premise must be ________.
negative; negative; negative
Corollary 1. No syllogism may have two ________ __________.
Corollary 2. If a syllogism has a particular premise, it must have a __________ __________.
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