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| Mirrors > Home > ILE Home > Th. List > mpcom | GIF version | ||
| Description: Modus ponens inference with commutation of antecedents. (Contributed by NM, 17-Mar-1996.) | 
| Ref | Expression | 
|---|---|
| mpcom.1 | ⊢ (𝜓 → 𝜑) | 
| mpcom.2 | ⊢ (𝜑 → (𝜓 → 𝜒)) | 
| Ref | Expression | 
|---|---|
| mpcom | ⊢ (𝜓 → 𝜒) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | mpcom.1 | . 2 ⊢ (𝜓 → 𝜑) | |
| 2 | mpcom.2 | . . 3 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
| 3 | 2 | com12 30 | . 2 ⊢ (𝜓 → (𝜑 → 𝜒)) | 
| 4 | 1, 3 | mpd 13 | 1 ⊢ (𝜓 → 𝜒) | 
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