In the wake of his enormously popular books The Armchair Economist and More Sex Is Safer Sex, Slate columnist and Economics professor Steven Landsburg uses concepts from mathematics, economics, and physics to address the big questions in philosophy: What is real? What can we know? What is the difference between right and wrong? And how should we live? Landsburg begins with the broadest possible categories from a mathematical analysis of the arguments for the existence of God; to the real meaning of the Heisenberg Uncertainty Principle and the Godel Incompleteness Theorem; to the moral choices we face in the marketplace and the voting booth. Stimulating, illuminating, and always surprising, The Bid Questions challenges readers to re-evaluate their most fundamental beliefs and reveals the relationship between the loftiest philosophical quests and our everyday lives.