“Know how and how much to tip people who expect gratuities, even in the case of poor service.”

American magazine columnist

Marilyn vos Savant is an American magazine columnist best known for her long-running "Ask Marilyn" column in Parade. Since 1986, she has answered readers’ questions and worked through puzzles in the Sunday feature, which later brought wide attention to the Monty Hall problem. She also became widely noted for having the highest recorded IQ in the Guinness Book of Records, a distinction the publication later retired as a competitive category. Her work is associated with clear, puzzle-based explanations and wide-ranging questions about reasoning and everyday problems.