Logicus to Johnuniq Geuttarda You are quite wrong JOHNUNIQ as is Guettarda There must be a point at which theories switch from bring rejected to being accepted if these terms are sufficiently well defined such as in terms of unanimity or a great majority or simple majority of the scientific community for example And you clearly think there was such a point that was earlier than mid 20th century But Darlington s testimony suggests 1950 would be too early rather than too late And it is not inconsequential to rationality theories of scientific revolutions whether we can prove when it was since dating should be in accordance with when the theory first proved itself evidentially over its predecessor s and competitor s Rationality theorists regard even a decade out as a counterexample Moreover as the philosopher of science Imre Lakatos pointed out in his 1973 LSE Lectures on Scientific Method nobody to date has found a demarcation criterion according to which Darwin can be described as scientific p24 Motterlini s 1999 For and Against Method And it seems this may still be the case So dating community conversions is important to identifying the logic of scientific revolutions