To avoid the problem of tediously drawn-out debates and equally irritating three-post threads, I propose the following:

1. Bring any philosophical topic you wish to the table.
2. Have a speed debate/brainstorm/whatever with a maximum of 10 posts. Declare a winner if applicable.
3. Get a new topic.
4. Repeat.

Keep it interesting enough to make having a quickie debate challenging. Off-subject posts shall result in the poster being tied to a rock and savaged by rabid lemmings.

I'll let someone else start it off.