Surprise: You can answer this question with modern algebra.

Students at the Walter Stillman School in Tenafly are trying to solve a real-life mystery: who mailed the book “Jumanji” back to the school library last week, 43 years after it was checked out?

Operator can’t yet book flights or hotels directly—it will surf on other platforms. The market values of all three big online agents are up from a year ago, despite news of OpenAI’s new bot.

This chapter begins with the underlying concepts of crisp logic, deals with the definition of an algebra or algebraic system and reviews the fundamentals of Boolean algebra. It argues that the entries ...