I think Bobert has it completely the wrong way round here. An argument that centres round ideas like "winning" or "losing" just means treating it all just as a game. And for some issues, they matter too much to be treated as a game.   

If we think that on some serious issue our view is the right one, that means we want to convince other people, and that means refusing to get into win and lose battles, even when it's tempting. People don't change their opinion because they "lose" an argument, or see someone else "losing" - they do it because the facts and argument as presented have the effect of making them see things differently.

Rather than picking on the weak points of the other side, and dodging past the difficult questions raised by an adversary, we should do it the other way round. That is how to encourage people to recognise that the position we are arguing for has genuine merit.

Leave the debating tricks, and play battles and that stuff for the issues that don't matter.