I think it's more like: As far as everyone is concerned, their own opinions are more correct than everyone else's. Which is what leads to debate, argument, etc.

I think it's more like: As far as everyone is concerned, their own opinions are more correct than everyone else's. Which is what leads to debate, argument, etc. If everyone believed opinions were all equally valid, they'd just live and let live. There'd be no reason for conflict. Edit: There's something incongruent about trying to discuss an opinion of how the validity of opinions is determined... Hmm...