Scott offers corrections about Polymarket's status and updates on the 2022 prediction contest, including calls for collaboration and ideas. Longer summary

Scott Alexander provides two corrections and updates to previous posts. First, he clarifies that Polymarket is still operational, offering real-money markets outside the US and working on a US-compliant product. Second, he reminds readers about the 2022 prediction contest entry deadline and shares a message from the contest organizers about potential collaborations with prediction markets and ideas for using the contest data. Shorter summary

Scott Alexander maintains a list of significant mistakes in his blog posts, providing corrections and updates in reverse chronological order. Longer summary

Scott Alexander maintains a list of significant mistakes he has made in his blog posts, providing corrections and updates. He acknowledges errors in data interpretation, misunderstandings of studies, incorrect predictions, and instances where he changed his mind based on new evidence or reader feedback. The list is presented in reverse chronological order and covers a wide range of topics including medicine, economics, psychology, and social issues. Shorter summary