unfortunately the reason CTs can feel self satisfied in their arguments so easily is they can simply refute any arguments with further CTs. i am certain any suggestion about moussauoi would be written off as he is a patsy that yadda yadda and the govt isnt letting the defense use any evidence blah blah.
also, you have the dreaded argument "well i am not saying the gov't did X Y or Z but they obviously are hiding something," hence, you cant really argue because they are basically saying "you might have some point about something, but overall, you have to admit something is totally wrong." thats the one i get. i had a couple of guys come into my bosses office and start jabbering about LC and he didnt know anything about it, so he just asked some very simple questions like "why would someone do that, what is the motivation" and they just said "man, no one knows, but you can tell what the govt said is lies, so we're just trying to figure it out." i didnt even enter the conversation, it was pointless.
oh and one other thing, i hate how smug and condescending CTs are. if you question their theories, they just treat you as a sad, naive sould who is being played the fool.
Oh, BTW, i left my bosses office and forwarded him a couple of succint articles debunking all the info the coworkers had just fed him just so we could have a laugh without sending them into some sort of tizzy.