'YGBM. That was a bit of science-fiction jargon from the turn of the century: You-Gotta-Believe-Me. That is, mind control. Weak, social forms of YGBM drove all human history. For more than a hundred years, the goal of irresistible persuasion had been a topic of academic study. For thirty years it had been a credible technological goal. And for ten, some version of it had been feasible in well-controlled laboratory settings.' "Rainbow's End - A Novel with One Foot in the Future"
"Vernor Vinge speculates on the application of technology to achieve brainwashing in Rainbows End (ISBN 0-312-85684-9), portraying separately the dangers of JITT (Just-in-time training) and the specter of YGBM (You gotta believe me). This picks up on themes of "mindrot" and controlled "Focus" in Vinge's earlier novel A Deepness in the Sky." Wikipedia