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Mirrors > Home > MPE Home > Th. List > orim12d | Structured version Visualization version GIF version |
Description: Disjoin antecedents and consequents in a deduction. See orim12dALT 909 for a proof which does not depend on df-an 397. (Contributed by NM, 10-May-1994.) |
Ref | Expression |
---|---|
orim12d.1 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
orim12d.2 | ⊢ (𝜑 → (𝜃 → 𝜏)) |
Ref | Expression |
---|---|
orim12d | ⊢ (𝜑 → ((𝜓 ∨ 𝜃) → (𝜒 ∨ 𝜏))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orim12d.1 | . 2 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
2 | orim12d.2 | . 2 ⊢ (𝜑 → (𝜃 → 𝜏)) | |
3 | pm3.48 961 | . 2 ⊢ (((𝜓 → 𝜒) ∧ (𝜃 → 𝜏)) → ((𝜓 ∨ 𝜃) → (𝜒 ∨ 𝜏))) | |
4 | 1, 2, 3 | syl2anc 584 | 1 ⊢ (𝜑 → ((𝜓 ∨ 𝜃) → (𝜒 ∨ 𝜏))) |
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