Metamath Proof Explorer


Theorem plvofpos

Description: rh is derivable because ONLY one of ch, th, ta, et is implied by mu. (Contributed by Jarvin Udandy, 11-Sep-2020)

Ref Expression
Hypotheses plvofpos.1 ⊢ χ ↔ ¬ φ ∧ ¬ ψ
plvofpos.2 ⊢ θ ↔ ¬ φ ∧ ψ
plvofpos.3 ⊢ τ ↔ φ ∧ ¬ ψ
plvofpos.4 ⊢ η ↔ φ ∧ ψ
plvofpos.5 ⊢ ζ ↔ ¬ μ → χ ∧ μ → θ ∧ ¬ μ → χ ∧ μ → τ ∧ ¬ μ → χ ∧ χ → η ∧ ¬ μ → θ ∧ μ → τ ∧ ¬ μ → θ ∧ μ → η ∧ ¬ μ → τ ∧ μ → η
plvofpos.6 ⊢ σ ↔ μ → χ ∨ μ → θ ∨ μ → τ ∨ μ → η
plvofpos.7 ⊢ ρ ↔ ζ ∧ σ
plvofpos.8 ⊢ ζ
plvofpos.9 ⊢ σ
Assertion plvofpos ⊢ ρ

Proof

Step Hyp Ref Expression
1 plvofpos.1 ⊢ χ ↔ ¬ φ ∧ ¬ ψ
2 plvofpos.2 ⊢ θ ↔ ¬ φ ∧ ψ
3 plvofpos.3 ⊢ τ ↔ φ ∧ ¬ ψ
4 plvofpos.4 ⊢ η ↔ φ ∧ ψ
5 plvofpos.5 ⊢ ζ ↔ ¬ μ → χ ∧ μ → θ ∧ ¬ μ → χ ∧ μ → τ ∧ ¬ μ → χ ∧ χ → η ∧ ¬ μ → θ ∧ μ → τ ∧ ¬ μ → θ ∧ μ → η ∧ ¬ μ → τ ∧ μ → η
6 plvofpos.6 ⊢ σ ↔ μ → χ ∨ μ → θ ∨ μ → τ ∨ μ → η
7 plvofpos.7 ⊢ ρ ↔ ζ ∧ σ
8 plvofpos.8 ⊢ ζ
9 plvofpos.9 ⊢ σ
10 8 9 pm3.2i ⊢ ζ ∧ σ
11 7 bicomi ⊢ ζ ∧ σ ↔ ρ
12 11 biimpi ⊢ ζ ∧ σ → ρ
13 10 12 ax-mp ⊢ ρ