@Math I don't really see what you mean by "you refuse to answer".
I never said that I refuse to answer question by some particular user.
Three are many users on this site. Most of them did not reply to your messages in the Set Theory chatroom. Does that mean that they "refuse to answer"?
The fact that I do not respond to every question on the main site and every message in chat does not mean that I refuse to answer them.
@Math That's perfectly fine. And if some user who knows about the topic and is willing to answer notices your message, they will respond. (I left a few comments on that particular topic now - more-or-less that's all I have to say to that.)