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Related theorems GIF version |
| Description: Deduction adding conjuncts to antecedent. |
| Ref | Expression |
|---|---|
| ad2ant.1 | ⊢ (φ → ψ) |
| Ref | Expression |
|---|---|
| ad2antll | ⊢ ((χ ⋀ (θ ⋀ φ)) → ψ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ad2ant.1 | . . 3 ⊢ (φ → ψ) | |
| 2 | 1 | adantl 388 | . 2 ⊢ ((θ ⋀ φ) → ψ) |
| 3 | 2 | adantl 388 | 1 ⊢ ((χ ⋀ (θ ⋀ φ)) → ψ) |