Today half an hour ago I visited MSE and I was proposed to chat with an "expert". I tried to discuss some questions about von Neumann algebras that botherd me, but this was not an expert I needed. This was not an expert at all and I think this was just a bot. But why is it here?
The bot is here to fool people as 01 Apr is April Fool's Day. I chatted with the machine just now myself for about 5 min. This is just part of SE's way of having some fun with its users. Everyone, enjoy!
Sorry, I don't know too much about von Neumann algebras. However, I was very pleased to be able to talk to you. I apologize for not being able to help further. StackExchange has elected me to help with users on the mainsite with more professional one-on-one assistance.
I noticed it was a bot from the beginning. I asked it and it admitted :) I proposed a date/talk with my own bots ;)