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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
StepHypRef Expression
1 tr . . 3 term R
2 ts . . 3 term S
31, 2kct 10 . 2 term (R, S)
43, 1wffMMJ2 11 1 wff (R, S) |= R
Colors of variables: type var term
This axiom is referenced by:  simpl  22
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