In this book Frederic Schick develops his challenge to standard decision theory. Professor Schick argues that talk of the beliefs and desires of an agent is not sufficient to explain choices. To account for a given choice we need to take into consideration how the agent understands the problem, how he sees in a selective way the options open to him. This book questions the foundations of technical and philosophical decision theory and will appeal to all those who work in that field, be they philosophers, economists or psychologists.