When Johnny brought home his latest math test, his dad wasn’t pleased. “How come you didn’t do well on your math test?” his dad asked sternly.
Johnny shrugged, trying to explain. “It’s because my teacher doesn’t teach well”, he said.
His dad looked surprised and pressed for more details. “What do you mean?”
“Well”, Johnny began, “first, she said 3 plus 5 equals 8. Then, she said 4 plus 4 equals 8, and later, she said 6 plus 2 equals 8. If she can’t get it right, how am I supposed to know what’s correct?”