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(Exists (?T1 ?T2)
(And (Term ?T1)
(Term ?T2)
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(Exists (?T1 ?T2)
(And (Term ?T1) (Term ?T2) (= ?X (Listof (Quote =) ?T1 ?T2))))
(Relsent ?X)
(<=> (Equation ?X)
(And (Relsent ?X)
(Exists (?T1 ?T2)
(And (Term ?T1)
(Term ?T2)
(= ?X (Listof (Quote =) ?T1 ?T2))))))