Two challenges have lately been posed to the importance of sincerity for our public discourse. On the one hand, it has been suggested that because sincerity is so difficult to identify, a preoccupation with the inner lives of others distracts us from the substance of what people say. On the other hand, some worry that making sincere statements can sometimes undermine the very deliberation that advocates of sincerity are so concerned to protect. In light of these challenges, I attempt to (...) analyze our interest in sincerity in terms of a concern for solidarity with our fellow citizens. I then argue that focusing on the sincerity of various assertions is not a good way to promote social cohesion and that this concern is better addressed by looking at the commitment that others have to the process of democratic deliberation. (shrink)