You're wrong!

On a discussion group I participate in, I had to explain to a friend why people told hym why hie is wrong about logic:

You're wrong because you hold to a world-view that says that people can be wrong. While more 'open-minded' folks hold to a more inclusive world-view where all views are right and no one is wrong, therefore you're wrong. The reason you are wrong is because your world-view is not inclusive, and therefore your world-view is wrong. If you believed that your world-view is right but that other world-views, even world-views that, if true, completely exclude yours, are also correct then you wouldn't be wrong. So, as you can see, the only people who can be wrong are those who believe that others can be wrong. Those who do not believe that others can be wrong, can't be wrong themselves.