 Another way to see the weakness of the truth-tracking justification of freedom of expression is to notice that this instrumental defense of freedom of expression cannot explain what is wrong with censorship that is successful in truth-tracking terms. Suppose we lived in a society of the sort Plato imagines in the Republic in which cognitive capacities are distributed unequally between rulers and citizens and in which maximally knowledgeable and reliable censors—call them “philosopher kings”—censor all and only false beliefs. The truth-tracking argument would provide no argument against censorship in such circumstances. This shows that the truth-tracking argument condemns only unsuccessful or incompetent censorship. For some, this may be the biggest worry about censorship. But many would have residual worries about successful or competent censorship. They would object to censorship, even by philosopher-kings. Answering this worry requires a more robust defense of expressive liberties.