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Mirrors > Home > ILE Home > Th. List > biimt | Unicode version |
Description: A wff is equivalent to itself with true antecedent. (Contributed by NM, 28-Jan-1996.) |
Ref | Expression |
---|---|
biimt |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1 6 | . 2 | |
2 | pm2.27 40 | . 2 | |
3 | 1, 2 | impbid2 142 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: pm5.5 241 a1bi 242 abai 550 dedlem0a 953 ceqsralt 2739 reu8 2908 csbiebt 3070 r19.3rm 3483 fncnv 5239 ovmpodxf 5949 brecop 6573 tgss2 12575 |
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