When I was growing up I knew a family with two kids, a boy named Ronald and a girl named Jillian. The girl studied hard and got good grades. The boy threw tantrums. 

Jill was blamed for Ron's tantrums, because that's what Ron said, and it was easier for the parents to punish Jill than to argue with Ron. He seemed to have an answer for everything, even though the parents and Jill all knew he was lying, always.