Theorem ee200 42268

Description: e200 42267 without virtual deductions. (Contributed by Alan Sare, 13-Jul-2011.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypotheses

Ref	Expression
ee200.1	⊢ (𝜑 → (𝜓 → 𝜒))
ee200.2	⊢ 𝜃
ee200.3	⊢ 𝜏
ee200.4	⊢ (𝜒 → (𝜃 → (𝜏 → 𝜂)))

Assertion

Ref	Expression
ee200	⊢ (𝜑 → (𝜓 → 𝜂))

Proof of Theorem ee200

Step	Hyp	Ref	Expression
1		ee200.1	. 2 ⊢ (𝜑 → (𝜓 → 𝜒))
2		ee200.2	. . . 4 ⊢ 𝜃
3	2	a1i 11	. . 3 ⊢ (𝜓 → 𝜃)
4	3	a1i 11	. 2 ⊢ (𝜑 → (𝜓 → 𝜃))
5		ee200.3	. . . 4 ⊢ 𝜏
6	5	a1i 11	. . 3 ⊢ (𝜓 → 𝜏)
7	6	a1i 11	. 2 ⊢ (𝜑 → (𝜓 → 𝜏))
8		ee200.4	. 2 ⊢ (𝜒 → (𝜃 → (𝜏 → 𝜂)))
9	1, 4, 7, 8	ee222 42122	1 ⊢ (𝜑 → (𝜓 → 𝜂))

Syntax hints:   → wi 4

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 206  df-an 397

This theorem is referenced by: (None)