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| Mirrors > Home > ILE Home > Th. List > 3adant3 | GIF version | ||
| Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 16-Jul-1995.) |
| Ref | Expression |
|---|---|
| 3adant.1 | ⊢ ((𝜑 ∧ 𝜓) → 𝜒) |
| Ref | Expression |
|---|---|
| 3adant3 | ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜃) → 𝜒) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3simpa 996 | . 2 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜃) → (𝜑 ∧ 𝜓)) | |
| 2 | 3adant.1 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝜒) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ ((𝜑 ∧ 𝜓 ∧ 𝜃) → 𝜒) |
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