How Many Things Are There? A Reply to Oliver and Beattie, Beattie and Oliver, Oliver and Beattie, and Oliver and Beattie


  • Address correspondence to Paul Z. Goldstein at his current address: Department of Entomology, American Museum of Natural History, Central Park West @ 79th, New York, NY 10024, U.S.A., email

  • Paper submitted April 8, 1996; revised manuscript accepted September 25, 1996.