The problem with communication is the illusion that it has occurred.

George Bernard Shaw (1856–1950) Irish playwright and critic

(Spurious)

Frequently attributed, but not found in Shaw's writings. It was most likely originated by William Hollingsworth Whyte, "Is Anybody Listening?" Fortune (1950-09).

Variant: "The problem with communication is the illusion that it has taken place."

More discussion: The Biggest Problem in Communication Is the Illusion That It Has Taken Place – Quote Investigator.