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| Mirrors > Home > ILE Home > Th. List > simpll | GIF version | ||
| Description: Simplification of a conjunction. (Contributed by NM, 18-Mar-2007.) | 
| Ref | Expression | 
|---|---|
| simpll | ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → 𝜑) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | id 19 | . 2 ⊢ (𝜑 → 𝜑) | |
| 2 | 1 | ad2antrr 488 | 1 ⊢ (((𝜑 ∧ 𝜓) ∧ 𝜒) → 𝜑) | 
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