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Step * of Lemma not-not-p-or-not-p-example

∀P:ℙ. (¬¬(P ∨ (¬P)))
BY
{ (Auto THEN D 0 THEN Auto) }

1
1. P : ℙ
2. ¬(P ∨ (¬P))
⊢ False

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Latex:

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Latex:
\mforall{}P:\mBbbP{}.  (\mneg{}\mneg{}(P  \mvee{}  (\mneg{}P)))


By

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Latex:
(Auto  THEN  D  0  THEN  Auto)

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