Theorem iidn3

Description: idn3 without virtual deduction connectives. Special theorem needed for the Virtual Deduction translation tool. (Contributed by Alan Sare, 23-Jul-2011) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	iidn3	⊢ ( 𝜑 → ( 𝜓 → ( 𝜒 → 𝜒 ) ) )

Proof

Step	Hyp	Ref	Expression
1		id	⊢ ( 𝜒 → 𝜒 )
2	1	2a1i	⊢ ( 𝜑 → ( 𝜓 → ( 𝜒 → 𝜒 ) ) )