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Metamath Proof Explorer

Theorem pm2.18i

Description: Inference associated with the Clavius law pm2.18 . (Contributed by BJ, 30-Mar-2020)

		Ref	Expression
	Hypothesis	pm2.18i.1	$⊢ \neg φ \to φ$
	Assertion	pm2.18i	$⊢ φ$

Step	Hyp	Ref	Expression
1		pm2.18i.1	$⊢ \neg φ \to φ$
2		pm2.18	$⊢ (\neg φ \to φ) \to φ$
3	1 2	ax-mp	$⊢ φ$