My "hypothesis" is that the Bazant/NIST explanation of the Twin Towers collapses is incorrect and based on a model that doesn't work in real life. Crush-up would inevitably occur before crush down. My evidence is the video evidence showing that, indeed, the upper block is seen to be crushing up before the hypothetical crush-down could even begin, and is not seen again in any videos or photos showing the collapse progression.
More evidence is found here, which demonstrates that crush-down would not happen before crush-up. These experiments obviously could be done with rubble-ized materials against intact materials, with even more dramatically negative results.
9/11 Experiments: The Arbitrator of Competing Hypotheses
So, if you disagree with this evidence, please show us examples in real life where crush-down of a major portion by a minor portion occurs before crush-up. Using ratios that are comparable to those we see in the WTC.