I'm perfectly happy not to state things authoritatively as fact that I don't know, or at least believe, to be true. Yet I'm the one arguing against the 'truth' movement. Funny, that.
And yet, when we get to the heart of this, it's as irrelevant as any of your non-claims. You're claiming that none of the firefighters came to this conclusion on their own, and your evidence for this is that some of them were warned by the OEM that the building might collapse; and you're then speculating that the only reason for the OEM to believe that the building might collapse was that they were in on a conspiracy to demolish it using explosives. Your entire argument is based on the assumption that people who had just watched two massive skyscrapers suffer severe impact damage, burn for between one and two hours, then collapse, couldn't possibly be intelligent enough to foresee the possibility that a third massive skyscraper, having just suffered severe impact damage and burned for much longer, might also collapse. The appeal to stupidity is yet another innovative fallacy of the truth movement, and this is a perfect specimen.
Dave