nil, you are either a newcomer to the World of Usenet, or you are very cautious, which is a nice thing to be, really. You will be given questions of the type “Are you sure you want to do this?” before doing anything dangerous. This is
nil, you will seldom be asked any questions by Gnus. It will simply assume you know what you're doing, no matter how strange. For example, quitting Gnus, exiting a group without an update, catching up with a group, deleting expired articles, and replying by mail to a news message will not require confirmation.
nil. It is
nil, require a confirmation when exiting Gnus. If
quiet, update any active summary buffers automatically without querying. The default value is