Razor be used on both sides, with two open edges. The blade on the double-edged safety razor is slightly curved to allow for a smoother and cleaner shave. In 1901, the American inventor King Camp Gillette, with the assistance of William Nickerson, patented a new variation of safety razor with disposable blades. Gillette realized that a profit could be made by selling an inexpensive razor with disposable blades. This has been called the razor and blades business model, and has become a very common practice for a wide variety of products. Many other brands of safety razors have come and gone.
Hanlon's razor Hanlon's razor Hanlon's razor is an aphorism expressed in various ways, including: An eponymous law, probably named after a Robert J. Hanlon, it is a philosophical razor which suggests a way of eliminating unlikely explanations for human behavior. Inspired by Occam's razor, the aphorism was popularized in this form and under this name by the "Jargon File", a glossary of computer programmer slang. In 1990, it appeared in the "Jargon File" described as a "'murphyism' parallel to Occam's Razor". Later that same year, the "Jargon File" editors noted lack of knowledge about the term's derivation and the existence of a