Folie à Quartet

Folie à deux: A condition in which symptoms of a mental disorder, such as the same delusional beliefs or ideas, occur simultaneously in two individuals who share a close relationship or association.

Folie à Quartet:  A condition in which symptoms of a mental disorder, such as the same delusional belief or idea that a negotiated settlement between the Israelis and Palestinians is within reach if only they will accept certain guidance, occurs simultaneously in four individuals (and their assistants and their assistants’ assistants) who hail, respectively, from the United States, the European Union, the United Nations, and Russia and share a close relationship or association.