Why the second floor lunch room encounter could not have happened

[LR Trotter]

Do you know how many people put LHO on the first floor?

Including himself?

Admittedly, I am not sure about what exactly is being asked here, or whom is being asked, but for clarification, is the question referencing multiple witnesses, including himself, that place LHO on the 1st floor at or very near 12:32pm CST, on 11/22/'63? I would tend to believe it possible for him to be there at 12:28pm, and/or maybe 12:36pm, but not at or very near 12:32pm.