tin return for . . . object-subject separation.fi A A 24. Von Focrstcr, op. cit. ficenot only a . .. observing this universe)* A A 25. RenAC Dubos, Man, Medicine, and Environment (New York: Frederick A. Praeger, Inc., 1968), p. 118. ficeThe past experience . . . their ultimate expressions)* A A 26. D. and K.