[kahljorn]

"al Queda is responsible for the 9/11 attacks"

You don't know who's responsible for the attacks, and the fact that you assume so because someone else(I doubt it was someone with direct knowledge, too) told you or put that idea in your head is just as desperate and deranged as any conspiracy theororist. The doubt he has for 9/11 is reasonable, even if within your mind he is approaching it from an unreasonable angle, but his argument seems clear enough. Why do you even pretend to debate if you have no inclination on at least listening? At the very least he offered evidence, all you offer is rhetoric that's not even yours.