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| Mirrors > Home > PE Home > Th. List > ndtruei-P3.17 | |||
| Description: Natural Deduction: '⊤' Introduction Rule.
This can be used to turn an ordinary theorem into a sequent. In this case '⊤' represents '𝛾' and any of the rules 1 - 15 can be applied. |
| Ref | Expression |
|---|---|
| ndtruei-P3.17.1 | ⊢ 𝜑 |
| Ref | Expression |
|---|---|
| ndtruei-P3.17 | ⊢ (⊤ → 𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ndtruei-P3.17.1 | . 2 ⊢ 𝜑 | |
| 2 | 1 | axL1.SH 30 | 1 ⊢ (⊤ → 𝜑) |
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