I'm a bit puzzled by the use of the word "sincerity" in this conversation. Forgive me for asking, but you use the word "insincere" because you believe that Kaveh doesn't believe in the apologies he renders on your behalf, am I correct? That is, you believe that he does so to maintain some image of social propriety that you don't particularly care for, and not in any sense that he might, in fact, believe his apologies serve a different purpose?
no subject