Theorem bj-axdd2ALT

Description: Alternate proof of bj-axdd2 (this should replace bj-axdd2 when bj-exalimi is moved to the main section). (Contributed by BJ, 8-Mar-2026) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	bj-axdd2ALT	$$⊢\exists x\phi \to \left(\forall x\psi \to \exists x\psi \right)$$

Proof

Step	Hyp	Ref	Expression
1		idd	$$⊢\phi \to \left(\psi \to \psi \right)$$
2	1	bj-exalimi	$$⊢\exists x\phi \to \left(\forall x\psi \to \exists x\psi \right)$$