Do you know why a full pancake collapse is impossible on the WTC Towers? Because a pancake collapse can only happen on a simple concrete structure like a parking garage. The WTC Towers were built with an extremely complex web of steel core columns, perimeter columns and an outer steel grid. It's scientifically impossible for this type of vertical steel network to collapse downward in a sequential progression - top to bottom. (floor by floor)
If the trusses were to be disconnected from the core columns and perimeter columns, than they might have some chance of pancaking down, but the core columns and perimeter columns wouldn't crumble down with them. Why? Because the columns and floors are constructed in two entirely different directions. The floors are stacked horizontal to the ground, but the columns are built vertical to the ground.
If the internal (horizontal floors) were removed with a pancaking, than at best, the core and perimeter columns, would fall over to the side...from instability...but they certainly wouldn't or couldn't collapse down upon themselves (telescoping) in a sequential progression from top to bottom without being cut with something like therma/ite.
To say that a sequential building collapse from top to bottom isn't a pancaking is to deny objective reality. The buildings came down top to bottom...so, NIST never even had a chance at a plausible collapse theory, because the only thing that could have been is a pancake collapse.
But, since we have studied the internal structure of the WTC Towers...and now know - that a full pancake collapse is scientifically impossible on the WTC Towers...NIST had no other choice but to engage in Doublethink - in order to make a possibility out of an impossibility.
