I am not sure what you are trying to tell me lol, you can tell the truth and say it's an opinion just because you believe in other things. But the truth eventually remains the truth either way you believe it or not. And if you want evidence, just look around yourself.
Discussion
You're thinking about it in reverse. The point was just because someone asserts an opinion doesn't make it true.
Dana Scully: “The truth is out there, but so are lies.”