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Mirrors > Home > ILE Home > Th. List > biimpi | Unicode version |
Description: Infer an implication from a logical equivalence. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
biimpi.1 |
Ref | Expression |
---|---|
biimpi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimpi.1 | . 2 | |
2 | bi1 111 | . 2 | |
3 | 1, 2 | ax-mp 7 | 1 |
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