\DOC ANTS_TAC

\TYPE {ANTS_TAC : tactic}

\SYNOPSIS
Split off antecedent of antecedent of goal as a new subgoal.

\DESCRIBE
{
   A ?- (p ==> q) ==> r
  ======================= ANTS_TAC
   A ?- p   A ?- q ==> r
}

\FAILURE
Fails unless the goal is of the specified form.

\USES
Convenient for focusing on assumptions of an implicational theorem that one
wants to use.

\SEEALSO
MP_TAC.

\ENDDOC