[6]> (setf people '((RIE 19) (TOM 22) (KEVIN 37) (ERIKA 9))) ((RIE 19) (TOM 22) (KEVIN 37) (ERIKA 9)) [7]> (remove 20 people :test #'<= :key #'second) ((RIE 19) (ERIKA 9)) ... Break 7 [21]> (remove 20 people :key #'second :test #'<= ) ((RIE 19) (ERIKA 9))