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Logic  /  Logic 101  ·  Atom · ~20 seconds

The Existential Fallacy

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On the Boolean reading, Rule 5: two universal premises cannot yield a particular conclusion — universals carry no existence, particulars assert it.

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All unicorns are horned; all horned things are dangerous; ∴ some unicorns are dangerous. Existence conjured from nowhere.

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On the Aristotelian standpoint this can pass — *if* the subject class is known non-empty. Standpoint first, verdict second.

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