Disambiguation between
Theorem:
(defthm fail-case-insensitive-string-when-match-case-sensitive-string (implies (and (tree-match-element-p tree (element-rulename *case-sensitive-string*) *grammar*) (tree-terminatedp tree)) (mv-nth 0 (parse-case-insensitive-string (append (tree->string tree) rest-input)))))