Saw that recently on Dan Millman's blog:
"Recently, a quotation by G.K. Chesterton caught my eye: The thing I hate about an argument is that it always interrupts a discussion.
I got to thinking about the difference between an argument and a discussion. I know the two are quite different, because Joy and I have gotten into some of both. (How about you?)
In a discussion, we carry on an objective dialogue about a subject ó we explore a topic from different angles to learn or clarify something about it.
When we have an argument, we tend to identify with a particular position and proceed to defend that point of view and to attack or belittle someone elseís view."
Without understanding WHY there's no point discussing - WHAT.