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Mirrors > Home > MPE Home > Th. List > sylan2br | Structured version Visualization version GIF version |
Description: A syllogism inference. (Contributed by NM, 21-Apr-1994.) |
Ref | Expression |
---|---|
sylan2br.1 | ⊢ (𝜒 ↔ 𝜑) |
sylan2br.2 | ⊢ ((𝜓 ∧ 𝜒) → 𝜃) |
Ref | Expression |
---|---|
sylan2br | ⊢ ((𝜓 ∧ 𝜑) → 𝜃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylan2br.1 | . . 3 ⊢ (𝜒 ↔ 𝜑) | |
2 | 1 | biimpri 227 | . 2 ⊢ (𝜑 → 𝜒) |
3 | sylan2br.2 | . 2 ⊢ ((𝜓 ∧ 𝜒) → 𝜃) | |
4 | 2, 3 | sylan2 593 | 1 ⊢ ((𝜓 ∧ 𝜑) → 𝜃) |
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