Theorem mercolem5

Description: Used to rederive the Tarski-Bernays-Wajsberg axioms from merco2 . (Contributed by Anthony Hart, 16-Aug-2011) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	mercolem5	⊢ ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) )

Proof

Step	Hyp	Ref	Expression
1		merco2	⊢ ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) )
2		merco2	⊢ ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜃 ) ) → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) )
3		mercolem1	⊢ ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜃 ) ) → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) → ( ( ( ⊥ → 𝜑 ) → 𝜃 ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) ) )
4	2 3	ax-mp	⊢ ( ( ( ⊥ → 𝜑 ) → 𝜃 ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) )
5		mercolem2	⊢ ( ( ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) → 𝜃 ) → ( ( ⊥ → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜃 ) ) )
6		merco2	⊢ ( ( ( ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) → 𝜃 ) → ( ( ⊥ → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜃 ) ) ) → ( ( ( ( ⊥ → 𝜑 ) → 𝜃 ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) ) → ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) ) ) ) )
7	5 6	ax-mp	⊢ ( ( ( ( ⊥ → 𝜑 ) → 𝜃 ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) ) → ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) ) ) )
8	4 7	ax-mp	⊢ ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) ) )
9	1 8	ax-mp	⊢ ( ( ( ( 𝜑 → 𝜑 ) → ( ( ⊥ → 𝜑 ) → 𝜑 ) ) → ( ( 𝜑 → 𝜑 ) → ( 𝜑 → ( 𝜑 → 𝜑 ) ) ) ) → ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) ) )
10	1 9	ax-mp	⊢ ( 𝜃 → ( ( 𝜃 → 𝜑 ) → ( 𝜏 → ( 𝜒 → 𝜑 ) ) ) )