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Related theorems GIF version |
| Description: Deduction adding a conjunct to antecedent. |
| Ref | Expression |
|---|---|
| 3adant.1 | ⊢ ((φ ⋀ ψ) → χ) |
| Ref | Expression |
|---|---|
| 3adant3 | ⊢ ((φ ⋀ ψ ⋀ θ) → χ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3simpa 787 | . 2 ⊢ ((φ ⋀ ψ ⋀ θ) → (φ ⋀ ψ)) | |
| 2 | 3adant.1 | . 2 ⊢ ((φ ⋀ ψ) → χ) | |
| 3 | 1, 2 | syl 10 | 1 ⊢ ((φ ⋀ ψ ⋀ θ) → χ) |