The passage Daniele Besomi [http://eh.net/pipermail/hes/2005-May/003034.html ] refers to is: "The history of science is far from being a linear unfolding that corresponds to a series of successive approximations toward some intrinsic truth. It is full of contradictions, of unexpected turning points." Prigogine and Stengers (1984) "Order out of Chaos" p xxviii Andy Denis