Closed blynn closed 4 years ago
DISCH_TAC already handles negation so the removed line is superfluous.
I tested this change by executing:
ITAUT a ==> ~(~a)
a ==> ~(~a)
DISCH_TAC already handles negation so the removed line is superfluous.
I tested this change by executing:
ITAUT
a ==> ~(~a)