Exactly! My main point is people at the time weren't even sure which flights they were talking about.
Yet Mutton-Head expects their recollection of what time they were doing what to be exactly right (not to mention that people have their watches set to different times - it's not totally odd in a random collection of people to have a variation of 15 - 20 minutes in the total range of different times on their watches, cellphones, etc).
Take right this moment... my PC says it is 1722. My phone says 1716. My clock in my room says 1721, and my wristwatch says 1723. That's a range of SEVEN MINUTES! And I'm only one person! AND I am completely calm and relaxed, with nothing else to think about, as I carefully look at each device and record the exact time.
I wouldn't be surprised to discover people's estimates of when a given action occured on 9/11 varying by 30 or 40 minutes.
-Andrew