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Theorem bj-nimni 32552
Description: Inference associated with bj-nimn 32551. (Contributed by BJ, 19-Mar-2020.)
Hypothesis
Ref Expression
bj-nimni.1  |-  ph
Assertion
Ref Expression
bj-nimni  |-  -.  ( ph  ->  -.  ph )

Proof of Theorem bj-nimni
StepHypRef Expression
1 bj-nimni.1 . 2  |-  ph
2 bj-nimn 32551 . 2  |-  ( ph  ->  -.  ( ph  ->  -. 
ph ) )
31, 2ax-mp 5 1  |-  -.  ( ph  ->  -.  ph )
Colors of variables: wff setvar class
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:  bj-bijust0  32561
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