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Related theorems Unicode version |
| Description: Syllogism deduction. (The proof was shortened by Mel L. O'Cat, 7-Aug-04.) |
| Ref | Expression |
|---|---|
| syld.1 |
|
| syld.2 |
|
| Ref | Expression |
|---|---|
| syld |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | syld.1 |
. 2
| |
| 2 | syld.2 |
. . . 4
| |
| 3 | 2 | syl3d 26 |
. . 3
|
| 4 | 3 | a2i 8 |
. 2
|
| 5 | 1, 4 | ax-mp 6 |
1
|