A famous quote says that "just beacuse you are right, does not mean, I am wrong."
But one of the those people debating whether it is a 6 or 9 painted on the floor is wrong. They need to step back, orient themselves, and see if there are any other numbers or clues to align with. There could be a driveway or a building to face, or they could ask someone else who might actually know.
People having an uninformed opinion about something they don't fundamentally understand and proclaiming their opinion as being equally valid as facts is ruining the world. Nobody wants to do any research – they just want to be right.