Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012)
Ref | Expression | ||
---|---|---|---|
Assertion | simp32l | |- ( ( ta /\ et /\ ( ch /\ ( ph /\ ps ) /\ th ) ) -> ph ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp2l | |- ( ( ch /\ ( ph /\ ps ) /\ th ) -> ph ) |
|
2 | 1 | 3ad2ant3 | |- ( ( ta /\ et /\ ( ch /\ ( ph /\ ps ) /\ th ) ) -> ph ) |