NIST made extraordinary claims in its WTC 7 report and presented two unprecedented phenomena in the history of architectural collapse.
These claims were not supported by any corroborating physical evidence.
A skeptic would be skeptical.
Maybe I didn't read back to the beginning of the argument in that case. I can't see any problem with that reasoning.
The problem with that reasoning is that it's unfinished. A skeptic should, indeed, be skeptical of NIST's conclusions. However, this is not the same as
rejecting NIST's conclusions. Rather, a skeptic should consider what evidence is available, and form the best possible provisional conclusion on the basis of that evidence, pending the discovery of further evidence. The conclusion to be sought, in this case, is the general one of what caused WTC7's collapse, and the principal candidates are: (1) Some combination of fire and impact damage, (2) Explosives, (3) Thermite, (4) Directed beam energy weapons and (5) nuclear explosives. (4) and (5) can immediately be rejected as reasonable conclusions because they are batcrap crazy. (2) can be very quickly rejected because there were no sufficiently loud noises recorded or reported at the appropriate time to initiate a collapse. (3) can be rejected as a reasonable conclusion because no plausible hypothesis has ever been offered as to how it might be achieved, and because there is no precedent for the collapse of a building being caused by thermite attached to the structural supports.
(1) is not only the sole remaining candidate, but is supported by other facts. For example, collapse of a building, particularly a steel-framed building or section of a building, due to fire and impact damage is not an extraordinary event; it has been observed on several occasions unrelated to 9/11. NIST's collapse hypothesis is a reasonable one, consistent with the known laws of physics and properties of materials (and therefore based on physical evidence, as this is how those laws and properties were determined) and with the known structure of WTC7. It's supported by documentary and testamentary evidence of the collapse, and by demonstrative evidence in the form of computer modelling. It would be demonstrated to a higher level of confidence if it were also supported by analysis of specific steel samples from WTC7, but due to the absence of any sufficiently good identifying features on WTC7 steel this wasn't attempted. However, it isn't necessary to accept the specific NIST collapse scenario in detail to conclude that WTC7 collapsed due to fire and impact damage; even without the NIST collapse analysis, it's still the only reasonable conclusion.
Dave