well, if it was a stairwell, wouldnt it have been INSIDE the core area?thats assuming its even concrete like the jackass says it is. i am not even convinced its concrete. for all i know it could be one of the stairways covered in gypsum.Occam's Razor says it was a floor
the simplest explanation is that since the ONLY concrete in the towers above grade were in the 4" thick floors, that it MUST be a floor section
but its not up to anyone of us to prove what it is. "the chosen one" claims its concrete then he needs to prove it.
this doesnt look like that could be the case