Description: Infer a conjunct from a triple conjunction. (Contributed by NM, 19-Apr-2005)
Ref | Expression | ||
---|---|---|---|
Hypothesis | 3simp1i.1 | ⊢ ( 𝜑 ∧ 𝜓 ∧ 𝜒 ) | |
Assertion | simp2i | ⊢ 𝜓 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3simp1i.1 | ⊢ ( 𝜑 ∧ 𝜓 ∧ 𝜒 ) | |
2 | simp2 | ⊢ ( ( 𝜑 ∧ 𝜓 ∧ 𝜒 ) → 𝜓 ) | |
3 | 1 2 | ax-mp | ⊢ 𝜓 |