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Tree-fix-when-nonleaf-norulename-nobranches

Definitions and Theorems

Theorem: tree-fix-when-nonleaf-norulename-nobranches

(defthm tree-fix-when-nonleaf-norulename-nobranches
  (implies (and (equal (tree-kind tree) :nonleaf)
                (not (tree-nonleaf->rulename? tree))
                (not (consp (tree-nonleaf->branches tree))))
           (equal (tree-fix tree)
                  '(:nonleaf nil nil))))