> Generally, no. If you have met the following conditions, airlines are not allowed to deny you permission to board, or remove you from the flight if you have already boarded the flight: You have checked-in for your flight before the check-in deadline set by the airlines; and A gate agent has accepted your paper boarding pass or electronically scanned your boarding pass and let you know that you may proceed to board

That is pretty clear, so you can stop making up stuff for the sake of an invalid argument.