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Mirrors > Home > ILE Home > Th. List > pm5.18im | Unicode version |
Description: One direction of pm5.18dc 869, which holds for all propositions, not just decidable propositions. (Contributed by Jim Kingdon, 10-Mar-2018.) |
Ref | Expression |
---|---|
pm5.18im |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm5.19 696 |
. 2
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2 | bibi1 239 |
. . 3
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3 | 2 | notbid 657 |
. 2
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4 | 1, 3 | mpbiri 167 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: xornbi 1365 |
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