It's a beta of a new SE interface. They are trying to see whether they can get rid of the troublesome users and replace them with a universal AI answer bot. People make mistakes, don't write clearly, slip decimal points, etc. We'll all be unnecessary soon, but for now they still have a few details to work out. The response to one of life's great questions wasn't quite ready for prime time yet:
The bot isn't really all that sophisticated. I remember a program from the late 1970s called Eliza that wasn't much worse than this. This is a long way from passing the Touring Test.
I did another one to see what it can do. I noticed the dialog box had a link at the top to the transcript of the session. I wonder if it's possible to see other transcripts. Deleting the leaf name from that link doesn't get you to a page with a bunch of transcripts. There are probably some good ones in there.