I reject your reality and substitute my own.
This phrase is used when someone refuses to accept the truth and makes up their own version of reality. It’s like they’re a kid who thinks they’re the best at everything, even if they’re not.
I’m the best at everything, even if I’m not.
I don’t care if you’re right, I’m still the best.
You’re right, but I’m the best, so that doesn’t matter.