Disambiguation between
Theorem:
(defthm fail-char-val-when-match-num/prose-val (implies (and (tree-match-element-p tree element *grammar*) (member-equal element (list (element-rulename *num-val*) (element-rulename *prose-val*))) (tree-terminatedp tree)) (mv-nth 0 (parse-char-val (append (tree->string tree) rest-input)))))