@kj00 Reality isn't based on what any person thinks. It's based on what's actually true.

It's a good job it is, otherwise there wouldn't be a version of not knowing, being wrong, miss-understandings. As well as an actual evidenced reality of deliberate deception.

If this person is a male masquerading as a woman or an actual female isn't changed by anyone getting it wrong by visual observance.

If I play dead am I dead because I appear to an observer to be dead. Am I resurrected if I get up once you're fooled?

By the way this type of reasoning is what psychopaths do. Mark Hoffman used to alter modern coins to appear vintage. He was so effective he tricked the US treasury department agents with his forgeries.
He concluded if people actually believe coins are historical then they are. They actually become historical. It's a way of working backwards.

This is what trans do. Hence your example of it. It's becoming wide spread not because pyschopaths are increasing in the society. But because the society is living more deeply and continuously in a digital internalised landscape which gravitates naturally to this backwards way of reasoning.