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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 |
|
| Ref | Expression |
|---|---|
| imbi2d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | imbid.1 |
. . 3
| |
| 2 | 1 | a1d 22 |
. 2
|
| 3 | 2 | pm5.74d 182 |
1
|
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