In this Wireless Philosophy video, Berislav Marušić (Brandeis University) talks about promises to do difficult things, such as the promise to spend the rest of one’s life with someone. Beri explains that such promises pose a philosophical problem: they seem to be either insincere, in case one doesn’t believe that one will keep them, or irrational, in case one does believe it. He describes how exactly the problem arises and sketches five possible responses.