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| Mirrors > Home > ILE Home > Th. List > simp1 | GIF version | ||
| Description: Simplification of triple conjunction. (Contributed by NM, 21-Apr-1994.) |
| Ref | Expression |
|---|---|
| simp1 | ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) → 𝜑) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3simpa 996 | . 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) → (𝜑 ∧ 𝜓)) | |
| 2 | 1 | simpld 112 | 1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜒) → 𝜑) |
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