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Description: Syllogism combined with contraction. (Contributed by NM, 11-Mar-2012)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | syl3anc.1 | ⊢ ( 𝜑 → 𝜓 ) | |
| syl3anc.2 | ⊢ ( 𝜑 → 𝜒 ) | ||
| syl3anc.3 | ⊢ ( 𝜑 → 𝜃 ) | ||
| syl3Xanc.4 | ⊢ ( 𝜑 → 𝜏 ) | ||
| syl23anc.5 | ⊢ ( 𝜑 → 𝜂 ) | ||
| syl32anc.6 | ⊢ ( ( ( 𝜓 ∧ 𝜒 ∧ 𝜃 ) ∧ ( 𝜏 ∧ 𝜂 ) ) → 𝜁 ) | ||
| Assertion | syl32anc | ⊢ ( 𝜑 → 𝜁 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | syl3anc.1 | ⊢ ( 𝜑 → 𝜓 ) | |
| 2 | syl3anc.2 | ⊢ ( 𝜑 → 𝜒 ) | |
| 3 | syl3anc.3 | ⊢ ( 𝜑 → 𝜃 ) | |
| 4 | syl3Xanc.4 | ⊢ ( 𝜑 → 𝜏 ) | |
| 5 | syl23anc.5 | ⊢ ( 𝜑 → 𝜂 ) | |
| 6 | syl32anc.6 | ⊢ ( ( ( 𝜓 ∧ 𝜒 ∧ 𝜃 ) ∧ ( 𝜏 ∧ 𝜂 ) ) → 𝜁 ) | |
| 7 | 4 5 | jca | ⊢ ( 𝜑 → ( 𝜏 ∧ 𝜂 ) ) |
| 8 | 1 2 3 7 6 | syl31anc | ⊢ ( 𝜑 → 𝜁 ) |