10, Occam's razor: in twelfth Century, Britain's Occam William advocated nominalism, only acknowledge the existence of things, think those wishy washy concept of universality are useless cumbersome, should be ruthlessly shave. He argued that no substance should be added without necessity. This is the usual Occam razor. The razor has made many people feel threatened, considered heretical beliefs, William I also suffer persecution. However, it does not damage the sharp knife, on the contrary, after hundreds of years, Occam's razor has been worn more quickly, and had overloaded the original narrow area, and has a broad, rich and profound meaning. Occam's razor's law can be further evolved into simple and complex laws in business management: it's simple to make things complex, and it's complicated to make things simple. This law requires that we deal with things, to grasp the essence of the main things, grasp the mainstream, solve the fundamental problem, especially the need to comply with nature, not to artificially complicate things, so that it can handle things.