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