Theorem bj-bijust0 32561

Description: The general statement that bijust 195 proves (with a shorter proof). (Contributed by NM, 11-May-1999.) (Proof shortened by Josh Purinton, 29-Dec-2000.) (Revised by BJ, 19-Mar-2020.)

Assertion

Ref	Expression
bj-bijust0	|- -. ( ( ph -> ph ) -> -. ( ph -> ph ) )

Proof of Theorem bj-bijust0

Step	Hyp	Ref	Expression
1		id 22	. 2 |- ( ph -> ph )
2	1	bj-nimni 32552	1 |- -. ( ( ph -> ph ) -> -. ( ph -> ph ) )

Syntax hints:   -. wn 3   -> wi 4

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem is referenced by: (None)