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Related theorems GIF version |
| Description: An inference based on modus ponens. |
| Ref | Expression |
|---|---|
| mpan.1 | ⊢ φ |
| mpan.2 | ⊢ ((φ ∧ ψ) → χ) |
| Ref | Expression |
|---|---|
| mpan | ⊢ (ψ → χ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mpan.1 | . 2 ⊢ φ | |
| 2 | mpan.2 | . . 3 ⊢ ((φ ∧ ψ) → χ) | |
| 3 | 2 | exp 291 | . 2 ⊢ (φ → (ψ → χ)) |
| 4 | 1, 3 | ax-mp 6 | 1 ⊢ (ψ → χ) |