The Simplification of the Induction Conclusion (Step 2)
Subgoal *1/2' (IMPLIES (AND (CONSP A) (EQUAL (APP (APP (CDR A) B) C) (APP (CDR A) (APP B C)))) (EQUAL (APP(IF T (CONS (CAR A) (APP (CDR A) B)) B) C) (APP A (APP B C)))).
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