Here's where we get the topics. If you have a topic for debate - post it. Make it specific, make it clear. It can be a basic assumption we hear all the time (such as the one we started with) or it can be a more specific one. It should be something you wish to research as well, not something where you know there is one study that proves your point, thus making it impossible to debate.
If you like a topic - give it a thumbs-up to "second" it.