First of all, brumsen, I agree that you have been civil (and coherent), a welcome change from many who have come over here. I will endeavour to treat you in kind.
1) They have not studied / modeled the collapses themselves, but truncated the timeline at the onset of collapse, assuming that total collapse was then inevitable; hence the discussion in eg Gordon Ross's paper;
First of all, the focus of the NIST research was on collapse initiation, not collapse progression. This makes perfect sense if you think about it:
- NIST is trying to understand why the collapse occurred
- NIST is trying to see if future collapses could be prevented
- Whether a building collapses in 15 seconds or 30 is of far lesser import than the fact it collapses at all
- Limited time and money for the study
There's also a scientific reason. The sheer number of variables in a dynamic collapse are incredible, compared to the standing structure which is more or less static. I'm not aware of any simulation so complex that has any credibility or repeatability.
I'm also not aware of any large structures that "stop" collapsing. Once you get a few hundred thousand tons moving, and they've already defeated the pillars that were designed to hold them up, the odds that some other portion of the structure will just happen to catch it are, shall we say, low.
2) They say that they have not found any evidence corroborating alternative hypotheses such as planted explosives, without actually having researched those hypotheses (well, at least they haven't written up such research)
I've answered similar questions before. Unfortunately they belie a fundamental misunderstanding of scientific investigation. You see, NIST or any other agency did not first formulate a theory of collapse, and then only look for evidence that supported that theory, stopping once they found it, disregarding the rest. It doesn't work like that.
NIST recovered evidence, ran tests, conducted simulations, and then looked to see how
all of these fit. It so happens that the facts both confirm the "official" theory
and refute the "controlled demolition" theory
at the same time.
You cannot send NIST out to test for demolition on a whim. You have to first show that the facts fit
both theories, and that a new test that could distinguish the two -- say checking for chemical residue, fracture mechanics, etc. -- was needed. However, since the facts already known do not fit the demolition theory, this is irrelevant. No point going out looking for additional evidence, because that theory is already proven wrong.
This is a basic principle of science. Otherwise we would forever be testing for null hypotheses. In like fashion, NIST did not specifically test to see if the WTC was brought down by an earthquake, a UFO, Godzilla
TM, whatever. The tests they conduct are
general up until the point that two different theories both fit.
The other option is if we find evidence that
doesn't fit the official theory. In that case, opening the field for alternative hypotheses is valid. So... do you have any evidence that doesn't fit the standard collapse scenario? Do you have an alternate theory that also satisfies the evidence collected so far? If so, please tell us about them. But if not, then the official story stands.