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HELP NULL Steven Hardy, March 1982 null(list) -> boolean; This returns TRUE iff it is given an empty list. An empty list is either NIL or a pair whose FRONT is FALSE and whose BACK is a PROCEDURE. This is what the end of a dynamic list looks like once the procedure has returned TERMIN. NULL expands dynamic lists if necessary. NULL will cause a mishap if its argument is not a list. See HELP * NIL, *PAIR, *PDTOLIST and TEACH * LISTS