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Mirrors > Home > MPE Home > Th. List > simpl | Structured version Visualization version GIF version |
Description: Elimination of a conjunct. Theorem *3.26 (Simp) of [WhiteheadRussell] p. 112. (Contributed by NM, 3-Jan-1993.) (Proof shortened by Wolf Lammen, 13-Nov-2012.) |
Ref | Expression |
---|---|
simpl | ⊢ ((𝜑 ∧ 𝜓) → 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1 6 | . 2 ⊢ (𝜑 → (𝜓 → 𝜑)) | |
2 | 1 | imp 445 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝜑) |
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