Christopher, Christopher, Christopher. You're dodging and your own claims are contradictory. Here's how:
1) You agree that the period at freefall was about 15% of the total collapse time.
Now then, according to both Chandler and NIST, that was roughly 2.25 to 2.5s.
Doing the math, it results in a total collapse time of 14 to 15s.
Curtain wall descent = roughly 7s
Freefall accel happened during that interval
Previous interval was 7 to 8s (From the time the East Penthouse descended into the building).
Freefall period was about halfway during the entire collapse. Definitely and conclusively NOT at the start of the collapse, as in a controlled demolition.
Sorry, but your claims are simply not supported by the documentary evidence. They are wrong by any standard worth mentioning.
2) The dodge. The question was 'Please tell us, how does this in any way resemble any CD which you can refer to? Please do tell.'
Just to be crystal clear,
we are demanding that you show us another controlled demolition where the freefall acceleration happened about halfway thru it - as opposed to the beginning of it, as we would expect.
I was not requesting another assertion that Dan Rather thought so. That is not and example of another CD with the same characteristics. And incidentally when you quotemine Dan Rather, you seem to miss that he said it was 'reminiscent'. I don't think Rather's claim is correctly interpreted as an expert opinion, nor did he claim it actually was a controlled demolition. Be careful you don't put words in his mouth. That wouldn't be honest.
3)I wrote 'Proof of CD is not just a brief period such as that.'
That means that there are a host of other vital criteria which need to be fulfilled in order for a collapse to be a controlled demolition. Normally this is very clear; demolition crews work for weeks to prepare buildings; permits are obtained; public announcements are made; large explosions are then seen and heard; much additional evidence of cutter charges and wires are present. In the case of the WTC buildings and WTC7, all of that evidence is lacking. And further damning the CD theory, there is the problem of how explosives could be used without blowing out the windows - there is zero evidence to demonstrate how this could have happened - just more bare assertion fallacies.
Nevermind the fact that not one single witness out of 10's of thousands of people reported seeing a single piece of controlled demolition equipment being placed into any of the buildings. That's a whole lot of lack of evidence right there...
That's the proof of CD which is required.
Your reply 'FFA for 100 feet can only occur when all the supporting structure has been removed' (that 2.25s interval out of 14 or 15s, remember?) is not sufficient proof of CD. It never will be. That is because the other criteria are not met, and the fact that structure was not there is not in dispute by anybody with any significant grasp of the subject - we already know the building was collapsing internally for about 8 seconds prior to the period which contains the FFA.
So we already have the mechanism for the removal of the structure. It is only you and other truthers who cannot bear to face this simple reality.
Your efforts to cloud the subject and insert these fallacies are failing. It should (but won't) bother you that you are burdened with offering such fallacies after nearly 9 years of Truther investigoogling and posturing.
One wonders when you will actually come up with some evidence to support your theories. Perhaps in another 9 years?