 People can make mistakes when they think that they have strong evidence to believe what they believe, but people who make this kind of mistakes are more prone to change their minds when they encounter new evidence than people who hold untrue beliefs based on prejudice (for an excellent discussion of Poulain’s Cartesian analysis of prejudice, see Schmitter 2018; also Fraisse 1985). The persistance of prejudice is an important insight, which is still very relevant for discussions about our “post-truth” society and different forms of populist rhetoric.