I'm right because I am, it's as simple as that. No, it's not a God-given thing, or a rational, well-thought-out thing, I'm simply right.
You're wrong because I don't like you. If you were right and I didn't like you, then I'd have to listen to you, but since you're wrong, I don't, so go away.
Of course, if you were right, then I wouldn't need to tell you this, since, well, you'd already know.
But you didn't know.
Which is why I'm telling you.
You're wrong.
So go away.