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Is it morally acceptable to kill one person to save five? How do we know the sun will rise tomorrow? Can a robot be human? In philosophy, the questions range from the wonderful to the strange, and from the ridiculous to the very serious indeed. With the aid of tall stories, jokes, common sense and bizarre insights, Peter Cave addresses some of the biggest issues in the subjects of ethics, knowledge, logic, politics, emotions, metaphysics and more. Replete with amusing and mind-boggling examples, The Big Think Book is the perfect gift for anyone who likes to puzzle over the conundrums of life and is an ideal introduction for new students of philosophy.