The 'irony' is, that the bombastic "99% Sure" posts inspire the thought provoking counterpoints, which is what we should all want.
It's great when a creative point is made, either for or against, that makes you question your own logic and viewpoint, or ties facts together.
I often find myself saying "Oh that's smart.", "Oh now that makes sense.", "Oh, I didn't know that.", or, "Oh I didn't think of that." in my head even though I may not agree or see it in the same way.
It doesn't come without the discussion though, so I'm obviously a big proponent of questioning everything and putting ideas out there to be dissected.