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Mirrors > Home > NFE Home > Th. List > trujust | Unicode version |
Description: Soundness justification theorem for df-tru 1319. (Contributed by Mario Carneiro, 17-Nov-2013.) |
Ref | Expression |
---|---|
trujust |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biid 227 | . 2 | |
2 | biid 227 | . 2 | |
3 | 1, 2 | 2th 230 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wb 176 |
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 |
This theorem is referenced by: (None) |
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