Axiom ax-wctl 31

Description: Reverse closure for the type of a context. (This axiom is unnecessary; see ax-cb1 29.) Prefer wctl 33. (New usage is discouraged.) (Contributed by Mario Carneiro, 8-Oct-2014.)

Hypothesis

Ref	Expression
wctl.1	⊢ (S, T):∗

Assertion

Ref	Expression
ax-wctl	⊢ S:∗

Detailed syntax breakdown of Axiom ax-wctl

Step	Hyp	Ref	Expression
1		hb 3	. 2 type ∗
2		ts	. 2 term S
3	1, 2	wffMMJ2t 12	1 wff S:∗

This axiom is referenced by:  wctl  33