Theorem bj-peircei

Description: Inference associated with peirce . (Contributed by BJ, 30-Mar-2020)

	Ref	Expression
Hypothesis	bj-peircei.1	$$⊢\left(\phi \to \psi \right)\to \phi$$
Assertion	bj-peircei	$$⊢\phi$$

Proof

Step	Hyp	Ref	Expression
1		bj-peircei.1	$$⊢\left(\phi \to \psi \right)\to \phi$$
2		peirce	$$⊢\left(\left(\phi \to \psi \right)\to \phi \right)\to \phi$$
3	1 2	ax-mp	$$⊢\phi$$