 This instrumental rationale may justify freedom of expression in preference to a policy of censorship whenever the censor finds the beliefs in question implausible or offensive. But it does not justify freedom of expression in preference to more conservative forms of censorship. If the question is what policies are likely to increase the ratio of true to false belief, we would seem to be justified in censoring opinions for whose falsity there is especially clear, compelling, and consistent or stable evidence. We would be on good ground in censoring flat-earthers (both literal and figurative).