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| Mirrors > Home > MPE Home > Th. List > orcd | Structured version Visualization version Unicode version | ||
| Description: Deduction introducing a
disjunct. A translation of natural deduction
rule |
| Ref | Expression |
|---|---|
| orcd.1 |
|
| Ref | Expression |
|---|---|
| orcd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | orcd.1 |
. 2
| |
| 2 | orc 400 |
. 2
| |
| 3 | 1, 2 | syl 17 |
1
|
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