Theorem nfcriOLDOLDOLD

Description: Obsolete version of nfcri as of 23-May-2024. (Contributed by Mario Carneiro, 11-Aug-2016) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Hypothesis	nfcriOLD.1	$$⊢\underset{\_}{Ⅎ}xA$$
Assertion	nfcriOLDOLDOLD	$$⊢Ⅎxy\in A$$

Proof

Step	Hyp	Ref	Expression
1		nfcriOLD.1	$$⊢\underset{\_}{Ⅎ}xA$$
2	1	nfcrii	$$⊢y\in A\to \forall xy\in A$$
3	2	nf5i	$$⊢Ⅎxy\in A$$