Brutus was lying when he claimed to know Caesar because I say so. This is the type of arguments that atheists use. Afterall, people who lived thousands of years after an event must know better what happened during that event than the poeple who witnessed it! That again, is the reasoning of atheists. It isn't based on any facts, only fantasies and contradictions. So how does one have an honest & intelligent conversation with people who use this kind of reasoning?