Philosophy, science, and common sense all refer to propositions--things we believe and say, and things which are true or false. But there is no consensus on what sorts of things these entities are. Jeffrey C. King, Scott Soames, and Jeff Speaks argue that commitment to propositions is indispensable, and each defend their own views on the debate. Here are three different philosophers, each defending a different view about the nature of propositions, criticizing each other's positions, and responding to these criticisms. The three philosophers are all extremely good, each of the three views is deeply interesting, the criticisms are sharp and perceptive, and the responses are clever and persuasive. Over the course of the book I was pulled in all three directions and back again multiple times . . . It made for exciting reading.