Theorem pm2.24i 104

Description: Inference version of pm2.24 79.

Hypothesis

Ref	Expression
pm2.24i.1	|- ph

Assertion

Ref	Expression
pm2.24i	|- (-. ph -> ps)

Proof of Theorem pm2.24i

Step	Hyp	Ref	Expression
1		pm2.24i.1	. . 3 |- ph
2	1	a1i 8	. 2 |- (-. ps -> ph)
3	2	con1i 96	1 |- (-. ph -> ps)

Syntax hints:  -. wn 2   -> wi 3

This theorem is referenced by:  niabn 758

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7

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