Need help with proving of a law of excluded middle from a formula ¬(¬A ∧ ¬B ∧ C) → (A ∨ B ∨ ¬C). I can use only 10 axioms : these axioms
Thank you very much!
2026-04-09 03:51:00.1775706660
Prove a law of excluded middle
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Hint. Instantiate the formula with $A$, $B$, and $C$ all being $P$. Then you can prove its left-hand side using $A_{10}$.