— A Session
The room that holds
In Chapter 22, one of the four sits in a room eight feet by ten with no windows and no shadows, and is spoken to with a precision no one has ever managed before.
A session is available to you. It takes about two minutes. Nothing you type is stored, sent, or leaves this page — there is no server behind it, and you should know that before you begin.
It will tell you something true. Then it will show you the mechanism, because that is the argument the novel is having — that being described accurately feels, from the inside, identical to being known.