This would normally be a Hidden Open Thread, but it’s visible so I can make more announcements:

1. Adversarial collaborators should email me (at scott[at]shireroth[dot]org) their payment details (Bitcoin, Paypal, or preferred charity) by next Sunday. If I don’t have your details by next Sunday, I will pay the entire prize to your collaborator who did give me their details. If I don’t have either person’s details by Sunday, I will keep the money.

2. One month ago, I discussed research into carbon dioxide in bedrooms. Some commenters told me they were going to change their ventilation based on that post. If you did so, I’d like to know how it went. Please take this short survey.

3. This is still an off-weekend thread, so no culture war discussion, please. But if you want, you can take a a short survey about the Kavanaugh hearings.