Steve Turnbull at 2015-05-08 14:39:47:
There are other important features of Roger's character: He never lies, and he's *always* right in his judgement of people. It's just that given his nature nobody believes him.
(It's also a brilliantly put together movie with superbly disguised set-ups and pay-offs on everything that Roger says - including the above quoted line about how sometimes laughter is the only weapon we have. Which is exactly how it works in the end.)