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Mirrors > Home > ILE Home > Th. List > imbi2d | Unicode version |
Description: Deduction adding an antecedent to both sides of a logical equivalence. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
imbid.1 |
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Ref | Expression |
---|---|
imbi2d |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imbid.1 |
. . 3
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2 | 1 | a1d 22 |
. 2
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3 | 2 | pm5.74d 182 |
1
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