 Barnes (2005a, 2008) maintains that predictivism is frequently a manifestation of a phenomenon he calls ‘epistemic pluralism’. A ‘T-evaluator’ (a scientist who assigns some probability to theory T) is an epistemic pluralist insofar as she regards one form of evidence to be the probabilities posted (i.e. publicly presented) by other scientists for and against T and other relevant claims (she is an epistemic individualist if she does not do this but considers only the scientific evidence ‘on her own’). One form of pluralistic evidence is the event in which a reputable scientist endorses a theory—this takes place when a scientist posts a probability for T that is (1) no lower than the evaluator’s probability and (2) high enough that subsequent predictive confirmation of T would redound to the scientist’s credibility (2008: 2.2). 