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”—cens