Shaving razor was essentially a small piece of a straight razor attached to a handle using a clamp mechanism. Before each shave the blade had to be attached to a special holder, stropped with a leather belt, and placed back into the razor. After a time, the blade needed to be honed by a cutler. In 1895, King Camp Gillette invented the double-edged safety razor, which utilised inexpensive, disposable blades sharpened from two sides. It took him until 1901 to build a working, patentable model, and commercial production began in 1903. The razor gained popularity during World War I when the
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