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Theorem annimdc 844
Description: Express conjunction in terms of implication. The forward direction, annimim 781, is valid for all propositions, but as an equivalence, it requires a decidability condition. (Contributed by Jim Kingdon, 25-Apr-2018.)
Assertion
Ref Expression
annimdc DECID DECID

Proof of Theorem annimdc
StepHypRef Expression
1 imandc 785 . . . 4 DECID
21adantl 262 . . 3 DECID DECID
3 dcim 783 . . . . 5 DECID DECID DECID
43imp 115 . . . 4 DECID DECID DECID
5 dcn 745 . . . . . 6 DECID DECID
6 dcan 841 . . . . . 6 DECID DECID DECID
75, 6syl5 28 . . . . 5 DECID DECID DECID
87imp 115 . . . 4 DECID DECID DECID
9 con2bidc 768 . . . 4 DECID DECID
104, 8, 9sylc 56 . . 3 DECID DECID
112, 10mpbid 135 . 2 DECID DECID
1211ex 108 1 DECID DECID
Colors of variables: wff set class
Syntax hints:   wn 3   wi 4   wa 97   wb 98  DECID wdc 741
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 629
This theorem depends on definitions:  df-bi 110  df-dc 742
This theorem is referenced by:  xordidc  1287
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