 Paradoxes are more than edifying surprises. Here is an edifying surprise that does not pose a paradox. Professor Statistics announces she will give random quizzes: “Class meets every day of the week. Each day I will open by rolling a die. When the roll yields a six, I will immediately give a quiz.” Today, Monday, a six came up. So you are taking a quiz. The last question of her quiz is: “Which of the subsequent days is most likely to be the day of the next random test?” Most people answer that each of the subsequent days has the same probability of being the next quiz. But the correct answer is: Tomorrow (Tuesday).