In this paper I provide an account of two forms of intellectual arrogance which cause the epistemic practices of conversational turn-taking and assertion to malfunction. I detail some of the ethical and epistemic harms generated by intellectual arrogance, and explain its role in fostering the intellectual vices of timidity and servility in other agents. Finally, I show that arrogance produces ignorance by silencing others (both preventing them from speaking and causing their assertions to misfire) and by fostering self-delusion in the (...) arrogant themselves. (shrink)