unsafely-flushable
;; may be moved with impunity. Has no side effects except possibly
;; consing, and is affected only by its arguments.
+ ;;
+ ;; Since it is not used now, its distribution in fndb.lisp is
+ ;; mere random; use with caution.
movable
;; The function is a true predicate likely to be open-coded. Convert
;; any non-conditional uses into (IF <pred> T NIL). Not usually