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 : Review of I. Lakatos and P. Feyerabend: “For and Against Method“. British Journal for the Philosophy of Science, 51: 919-922.