For many decades the proponents of 'artificial intelligence' have maintained that computers will soon be able to do everything that a human can do In his bestselling work of popular science Sir Roger Penrose takes us on a fascinating tour through the basic principles of physics cosmology mathematics & philosophy to show that human thinking can never be emulated by a machine Oxford Landmark Science books are 'must-read' classics of modern science writing which have crystallized big ideas & shaped the way we think