For Popper scientific communities are politically virtuous because they permit unfettered criticism.   A scientific community is, by (Popper’s) definition, an open society.  Kuhn had to be shouted down because he seemed to deny this claim.”

Page 920 of B. Larvor [2000]:   Review of I. Lakatos and P. Feyerabend: “For and Against Method“. British Journal for the Philosophy of Science, 51: 919-922.