Theorem bj-looinvii

Description: Inference associated with bj-looinvi . (Contributed by BJ, 30-Mar-2020)

	Ref	Expression
Hypotheses	bj-looinvii.1	|- ( ( ph -> ps ) -> ps )
	bj-looinvii.2	|- ( ps -> ph )
Assertion	bj-looinvii	|- ph

Proof

Step	Hyp	Ref	Expression
1		bj-looinvii.1	|- ( ( ph -> ps ) -> ps )
2		bj-looinvii.2	|- ( ps -> ph )
3	1	bj-looinvi	|- ( ( ps -> ph ) -> ph )
4	2 3	ax-mp	|- ph