Here are the teams that have registered for the adversarial collaboration contest so far.

1. Joel P. and Missingno on circumcision.

2. Yaleocon and flame7926 on incarceration.

3. Eigenmoon and Andrew S. on the simulation argument.

4. James B. and Reed on abortion.

5. TracingWoodgrains and lazygraduatestudent on critical learning periods.

6. TracingWoodgrains and Rhys Fenwick on reducing the abortion rate.

7. David G. and Froolow on eating meat.

Since that’s more than five, the contest is officially going to happen!

I’ll give everyone else one more chance to sort out teams, in the comment section here. Please don’t comment unless you’re proposing an adversarial collaboration topic. All other posts will be deleted. Please email me at scott@slatestarcodex.com once you’ve got a team and topic.

Also, an experiment: only people with usernames A-M can propose. People with names N-Z, you’re stuck accepting from here out (people with names A-M can still accept if they want to). This is to address the problem where nobody accepts anyone else’s offer because they’d rather propose their own topic. If it works, I’ll do it the opposite way around next year. If you care enough about this to register a new username, whatever.