If both sides of an arguement claim victory, then how do you conclusively know who really won?
The problem with the internet is that you don't usually feel stupid when people gang up on you and tell you you're wrong. As such, you can constantly say you're right with the same arguments that are proven wrong.
In the end, there is no winner on the internet, just a lot of losers.
On the other hand, in real life it's easy to feel stupid when someone proves you wrong and the group boos you off stage for being an idiot.