Logic / Logic 101 · Atom · ~20 seconds
The Existential Fallacy
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State
On the Boolean reading, Rule 5: two universal premises cannot yield a particular conclusion — universals carry no existence, particulars assert it.
Show
All unicorns are horned; all horned things are dangerous; ∴ some unicorns are dangerous. Existence conjured from nowhere.
Watch for
On the Aristotelian standpoint this can pass — *if* the subject class is known non-empty. Standpoint first, verdict second.
Unlocks
- Nothing yet depends on this.