Unpredictable: This may be a symptom of multiple personality—different personalities differ—so saying you intend to be unpredictable may be a cover story.

One reason that multiple personality is usually undiagnosed is that people who have it come up with good cover stories.

Among the main clues to multiple personality are a puzzling inconsistency and memory gaps. What would be good cover stories?

As discussed in past posts, Mark Twain, who gave many interviews, had the humorous cover story that he was an intentional liar. William Faulkner, who avoided interviews, because he might contradict himself, had the cover story that an artist should be known only by his art.

Traditionally, people tout their consistency and don’t want to be called flip-floppers. So it may be a cover story—to cover up multiple personality—if someone says that he intends to be unpredictable.