Theorem 3imp231

Description: Importation inference. (Contributed by Alan Sare, 17-Oct-2017)

	Ref	Expression
Hypothesis	3imp.1	$$⊢\phi \to \left(\psi \to \left(\chi \to \theta \right)\right)$$
Assertion	3imp231	$$⊢\left(\psi \wedge \chi \wedge \phi \right)\to \theta$$

Proof

Step	Hyp	Ref	Expression
1		3imp.1	$$⊢\phi \to \left(\psi \to \left(\chi \to \theta \right)\right)$$
2	1	com3l	$$⊢\psi \to \left(\chi \to \left(\phi \to \theta \right)\right)$$
3	2	3imp	$$⊢\left(\psi \wedge \chi \wedge \phi \right)\to \theta$$