Amazon.com description: Product Description: In 1936, twenty-four-year-old Alan Turing wrote a remarkable paper in which he outlined the theory of computation, laying out the ideas that underlie all modern computers. This powerful theory now forms the basis of computer science. In Turing's Vision, Chris Bernhardt argues that the strength of Turin's theory is its simplicity; explained in a straightforward manner, it is eminently understandable by the nonspecialist. Bernhardt explores the concept of undecidability by way of three well-known decision problems, investigates theoretical computing machines, explains universal machines, and proves that certain problems are indeed undecidable.