Major Section: INTRODUCTION-TO-THE-THEOREM-PROVER
According to the sentence, the conjecture being proved is
``reversing the reverse of a true-listp
yields the original list.''
The formula corresponding to this conjecture is:
(implies (true-listp z) (equal (rev (rev z)) z)).We're also told that this is an inductive proof. Evidently we're doing an induction on the structure of the list
z
. Then the
Base Case is the formula:
(implies (endp z) (implies (true-listp z) (equal (rev (rev z)) z))).
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