Well, I'll give it a shot.
Mackey said in post 244:
Now, I believe that he is expressing a wish that you explain the basis for your belief that AA175 could not have attained a velocity near approximately 560 miles per hour.
If it absolutely couldn't, then there is some maximum velocity that it could reach.
I believe that he does not wish to put words in your mouth, but rather wants a simple exposition from you of what you believe the maximum attainable velocity of AA175 would be under conditions in which the aircraft need not be reusable.
I think nearly any reasonable units - IAS, CAS, TAS, Mach, or EAS would be accepted, as long as you supply your assumptions and math.
I personally would consider it a bonus if you could explain why the speeds calculated from the radar data are wrong.