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| Mirrors > Home > NFE Home > Th. List > mp2an | GIF version | ||
| Description: An inference based on modus ponens. (Contributed by NM, 13-Apr-1995.) |
| Ref | Expression |
|---|---|
| mp2an.1 | ⊢ φ |
| mp2an.2 | ⊢ ψ |
| mp2an.3 | ⊢ ((φ ∧ ψ) → χ) |
| Ref | Expression |
|---|---|
| mp2an | ⊢ χ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mp2an.2 | . 2 ⊢ ψ | |
| 2 | mp2an.1 | . . 3 ⊢ φ | |
| 3 | mp2an.3 | . . 3 ⊢ ((φ ∧ ψ) → χ) | |
| 4 | 2, 3 | mpan 651 | . 2 ⊢ (ψ → χ) |
| 5 | 1, 4 | ax-mp 5 | 1 ⊢ χ |
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