Theorem bj-jarrii

Description: Inference associated with jarri . Contrary to it , it does not require ax-2 , but only ax-mp and ax-1 . (Contributed by BJ, 29-Mar-2020) (Proof modification is discouraged.)

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

Proof

Step	Hyp	Ref	Expression
1		bj-jarrii.1	|- ( ( ph -> ps ) -> ch )
2		bj-jarrii.2	|- ps
3	2	a1i	|- ( ph -> ps )
4	3 1	ax-mp	|- ch