Axiom ax-simpl 20

Description: Extract an assumption from the context. (Contributed by Mario Carneiro, 8-Oct-2014.)

Hypotheses

Ref	Expression
ax-simpl.1	|- R:*
ax-simpl.2	|- S:*

Assertion

Ref	Expression
ax-simpl	|- (R, S) |= R

Detailed syntax breakdown of Axiom ax-simpl

Step	Hyp	Ref	Expression
1		tr	. . 3 term R
2		ts	. . 3 term S
3	1, 2	kct 10	. 2 term (R, S)
4	3, 1	wffMMJ2 11	1 wff (R, S) |= R

This axiom is referenced by:  simpl  22