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Theorem jcai 522
Description: Deduction replacing implication with conjunction. (Contributed by NM, 5-Aug-1993.)
Hypotheses
Ref Expression
jcai.1
jcai.2
Assertion
Ref Expression
jcai

Proof of Theorem jcai
StepHypRef Expression
1 jcai.1 . 2
2 jcai.2 . . 3
31, 2mpd 14 . 2
41, 3jca 518 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wa 358
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8
This theorem depends on definitions:  df-bi 177  df-an 360
This theorem is referenced by:  reu6  3025  opkthg  4131  f1o2d  5727  enprmaplem5  6080  nchoicelem17  6305
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