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🔗 Computing/Free and open-source software

🔗 Statistics

Survivorship bias or survival bias is the logical error of concentrating on the people or things that made it past some selection process and overlooking those that did not, typically because of their lack of visibility. This can lead to false conclusions in several different ways. It is a form of selection bias.

Survivorship bias can lead to overly optimistic beliefs because failures are ignored, such as when companies that no longer exist are excluded from analyses of financial performance. It can also lead to the false belief that the successes in a group have some special property, rather than just coincidence (correlation proves causality). For example, if three of the five students with the best college grades went to the same high school, that can lead one to believe that the high school must offer an excellent education. This could be true, but the question cannot be answered without looking at the grades of all the other students from that high school, not just the ones who "survived" the top-five selection process. Another example of a distinct mode of survivorship bias would be thinking that an incident was not as dangerous as it was because everyone you communicate with afterwards survived. Even if you knew that some people are dead, they wouldn't have their voice to add to the conversation, leading to bias in the conversation.

🔗 London 🔗 Philately 🔗 Trains 🔗 Trains/UK Railways 🔗 London Transport

The London Pneumatic Despatch Company (also known as the London Pneumatic Dispatch Company) was formed on 30 June 1859, to design, build and operate an underground railway system for the carrying of mail, parcels and light freight between locations in London. The system was used between 1863 and 1874.

🔗 Germany 🔗 Denmark 🔗 Automobiles

The CityEl is a 3-wheel lightweight electric car originally designed and manufactured in Denmark, but currently made in Germany by Citycom GmbH.

🔗 Soviet Union 🔗 Russia 🔗 History 🔗 Germany 🔗 Politics 🔗 Cold War 🔗 European history

The Stalin Note, also known as the March Note, was a document delivered to the representatives of the Western Allies (the United Kingdom, France, and the United States) from the Soviet Union in Germany on 10 March 1952. Soviet general secretary and premier Joseph Stalin put forth a proposal for a German reunification and neutralisation with no conditions on economic policies and with guarantees for "the rights of man and basic freedoms, including freedom of speech, press, religious persuasion, political conviction, and assembly" and free activity of democratic parties and organizations.

James Warburg, a member of the United States Senate Committee on Foreign Relations, testified before the committee on 28 March 1952 and observed that the Soviet proposal might be a bluff, but he thought that it seemed "that our government is afraid to call the bluff for the fear that it may not be a bluff at all" and might lead to "a free, neutral, and demilitarised Germany", which might be "subverted into Soviet orbit". That led to an exchange of notes between the West and the Soviet Union, which eventually ended after the West had insistence for a unified Germany to be free to join the European Defence Community and to be rearmed, demands that Stalin rejected.

West German Chancellor Konrad Adenauer and the Western Allies characterised Stalin's move as an aggressive action that attempted to stall the reintegration of West Germany. However, there was later a debate on whether a chance for reunification had been missed. Six years after the exchange, two West German ministers, Thomas Dehler and Gustav Heinemann, blamed Adenauer for not having explored the chance of reunification.

🔗 Economics 🔗 Numismatics

In economics, Gresham's law is a monetary principle stating that "bad money drives out good". For example, if there are two forms of commodity money in circulation, which are accepted by law as having similar face value, the more valuable commodity will gradually disappear from circulation.

The law was named in 1860 by Henry Dunning Macleod, after Sir Thomas Gresham (1519–1579), who was an English financier during the Tudor dynasty. However, the concept itself had been previously expressed by others, including by Aristophanes in his play The Frogs, which dates from around the end of the 5th century BC, in the 14th century by Nicole Oresme c. 1350, in his treatise On the Origin, Nature, Law, and Alterations of Money, and by jurist and historian Al-Maqrizi (1364–1442) in the Mamluk Empire; and in 1519 by Nicolaus Copernicus in a treatise called Monetae cudendae ratio For this reason, it is occasionally known as the Gresham–Copernicus' law.

🔗 Medicine 🔗 Conservatism

Ronald Reagan Speaks Out Against Socialized Medicine is a 1961 LP featuring the actor Ronald Reagan. In this more than ten-minute recording, Reagan "criticized Social Security for supplanting private savings and warned that subsidized medicine would curtail Americans' freedom" and that "pretty soon your son won't decide when he's in school, where he will go or what he will do for a living. He will wait for the government to tell him." Roger Lowenstein called the LP part of a "stealth program" conducted by the American Medical Association (see Operation Coffee Cup).

🔗 Transport 🔗 Trains

The Cosmopolitan Railway was a proposed global railroad network advocated by William Gilpin, formerly the first territorial governor of Colorado (1861–62), in his 1890 treatise Cosmopolitan Railway: Compacting and Fusing Together All the World's Continents. Gilpin named his capital city of Denver as the "railroad centre of the West".

🔗 Pink Floyd

The Publius Enigma is an Internet phenomenon and an unsolved problem that began with cryptic messages posted by a user identifying only as "Publius" to the unmoderated Usenet newsgroup alt.music.pink-floyd through the Penet remailer, a now defunct anonymous information exchange service. The messenger proposed a riddle in connection with the 1994 Pink Floyd album The Division Bell, promising that the answer would lead to a reward.

Guitarist David Gilmour denied any involvement, while album artist Storm Thorgerson was bemused. According to drummer Nick Mason, EMI Records were responsible. It remains unclear if the enigma involves a genuinely solvable puzzle as part of an early Internet-based contest or was a convoluted hoax.

User:Diikiw/Wiikid, formerly Wikiid, is an article that was created on the web site Wikipedia in 2008. It is notable in its attempt to become the first Wikipedia page to gain notoriety solely for the fact that it was a page on Wikipedia; this was intended to spark a debate as to whether or not Wikipedia could be considered a source notable enough to allow a page’s permanent entry on the site. It can be looked at both as metahumor and as a piece of postmodern art.