EQ_TAC : tactic
STRUCTURE
SYNOPSIS
Reduces goal of equality of boolean terms to forward and backward implication.
DESCRIPTION
When applied to a goal A ?- t1 = t2, where t1 and t2 have type bool, the tactic EQ_TAC returns the subgoals A ?- t1 ==> t2 and A ?- t2 ==> t1.
             A ?- t1 = t2
   =================================  EQ_TAC
    A ?- t1 ==> t2   A ?- t2 ==> t1

FAILURE
Fails unless the conclusion of the goal is an equation between boolean terms.
SEEALSO
HOL  Kananaskis-14