Johnny thought he could talk his way out of anything—until his teacher examined the test beside his. Accused of cheating, he demanded proof and confidently defended two matching answers that seemed innocent. But Mr. Johnson had saved one final question, and Johnny was about to discover that his biggest mistake wasn’t getting history wrong—it was copying another student’s ans…

After a history test, Mr. Johnson called Johnny to his desk with a troubling suspicion. Johnny looked astonished: if his teacher thought he had cheated, he wanted evidence. Mr. Johnson pointed out that Mary, the girl sitting beside him, had named George Washington as the first president—and Johnny had written exactly the same thing. Johnny wasn’t impressed. Everyone knew that answer. Next came the question about who freed the slaves. Both students had answered Abraham Lincoln. Again, Johnny had an explanation ready: he had read his history book the night before.

But Mr. Johnson wasn’t finished. He turned to the question asking who was president during the Louisiana Purchase. This time, Mary hadn’t supplied a historical name for Johnny to defend as common knowledge. Instead, she had simply written, “I don’t know.” And beneath that same question on Johnny’s paper sat the answer that undid his entire defense: “Me neither.”