Circular argument -- it's the same bag because it's the same bag.
There is nothing circular about this Inspector Ding-a-Ling except your IQ. What is the best evidence of an object's size? Someone's estimate or measuring the object itself? Surely a lazy contrarian, defense attorney would acknowledge that witnesses are often wrong as to details?
So what needs to be explained if this is not Oswald's bag: 1) bad luck by Old Lee to have touched and left his prints on this particular bag (the only TSBD employee to have done so); 2) its location near the SN; 3) no bag matching Frazier's estimate ever being found; 4) Oswald himself denying he carried any bag along the size estimated by Frazier; 5) multiple DPD officers confirming the bag was found on the 6th floor; 6) no apparent work-related purpose for such a bag to be in the TSBD; 7) no one else ever coming forward who worked in the building to indicate it was their bag or who could explain its presence (50 plus years and counting).
What needs to be explained if this is Oswald's bag: 1) Frazier was off in his estimate of its length.
