The 1980s saw psychologists discovering a lot of "repressed" memories in patients. As it turned out, they weren't so much memories as inventions. Are all those patients stuck with false memories of Satanic abuse and alternate personalities forever?
There are all kinds of ways to make people misremember things. But can you make a person misremember a specific word? This might be an interesting parlor game, or an interesting mass experiment.
There's a famous joke question: "When did you stop beating your wife?" The structure of the question is funny — or disturbing — because any response condemns you. You'd assume that a quick-witted person could see through it. But this study proves that you're wrong.