A couple of my friends mentioned it, without being able to pinpoint what it was, so I wasn't asking about it too much. However, it's denial cannot be existed if it's on the map of the rationalist community. What the heck is 'post-rationality'?
Darcey Riley (lucidian) has written the introductory post to a planned series of "what is postrationality?" posts.
Edit (2017-01-22): Metarationality Repository
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.