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\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
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