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[William Seger]

18. Umm, no

Since the girder connections were simple shear connections rather than moment connections, what I would expect to happen when the interior columns collapsed would be for the girders spanning to the exterior to break away from the exterior columns and beams as they fell, leaving the shell of exterior columns, beams, and curtain walls standing momentarily to fall in one piece. That's supposition, of course, but you're trying to dodge the valid point that if the curtain walls weren't included in the model, then there is no reason to expect the simulation to LOOK like the collapse videos where all we can see is the curtain wall. The only issue is whether the physics of the progressive collapse of the interior structure was accurately modeled in the simulation, and you certainly haven't given any valid reason to challenge that.

> You're not interested in hypotheses that fit the evidence--perhaps better than your own hypotheses. You prefer to discard them with a dismissive label.

LOL, pretty cheeky for someone who seems to be so reticent to even offer anything resembling a coherent hypothesis, much less one that fits the evidence, while completely ignoring the abundant evidence that says that controlled demolition theories are abject bullshit. Who do you think you're kidding? Yes, I'm dismissive of that bullshit, but I've always given the explicit reasons, not "labels," why is should be dismissed, and from where I sit,you seem to be having a tough time responding to those reasons. Could be that reading comprehension thing again, but I'll keep giving those reasons until you at least acknowledge their existence.

> No silent explosives are needed. If explosives were planted inside hollow core columns, and the column walls were heated with incendiaries, a relatively small charge could cause the columns to buckle without breaking the walls of the column so the sound would remain contained.

No offense, of course, but that's gotta be on the short list of most absurd claims I've ever seen posted on this board -- and that's tough competition. You seem to be fond of ad hoc "just so stories" that don't make much sense, but we don't need to even discuss how laughable that hypothesis would be even if the core columns were hollow, because they weren't.

> You didn't answer my question. Do you have any audio of the sound of 47 concrete floors collapsing invisibly inside WTC7? Why not? Do you think that would have been silent?

Actually, "truthers" have compiled such a video which pretends to answer to the lack of any sounds that sounded remotely like the high-explosives needed for a demolition:

It's unfortunate that whoever put that together didn't first check out a few youtube videos of actual demolitions, because a quick comparison to the sharp cracking sound of high explosives unavoidably present in actual controlled demolitions demonstrates that his video is actually strong evidence that that it was NOT a controlled demolition, and the "explosions" heard were the sounds of the interior structure collapsing.