There are some questions that never age. It is answers that grow old. We begin our book with such a question. “Four kings—Hanoverians—George I, George II, George III, and George IV all died on the same day of the week, Saturday. The probability that we are dealing here with a random event is extremely low. Can we make a conclusion that Saturday is a day of ill omen for this dynasty? And if so, then what is the value of statistical methods of hypothesis verification?”