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Since the advent of the cyberpunk genre, a number of derivatives of cyberpunk have become recognized in their own right as distinct subgenres in speculative fiction, especially in science fiction.

Rather than necessarily sharing the digitally- and mechanically-focused setting of cyberpunk, these derivatives can display other futuristic, or even retrofuturistic, qualities that are drawn from or analogous to cyberpunk: a world built on one particular technology that is extrapolated to a highly sophisticated level (this may even be a fantastical or anachronistic technology, akin to retrofuturism), a gritty transreal urban style, or a particular approach to social themes.

Steampunk, one of the most well-known of these subgenres, has been defined as a "kind of technological fantasy;" others in this category sometimes also incorporate aspects of science fantasy and historical fantasy. Scholars have written of the stylistic place of these subgenres in postmodern literature, as well as their ambiguous interaction with the historical perspective of postcolonialism.

Vivian Dorothy Maier (February 1, 1926 – April 21, 2009) was an American street photographer whose work was not discovered and recognized until after her death. She worked for about forty years as a nanny, mostly in Chicago's North Shore, while she pursued her photography. She took more than 150,000 photographs during her lifetime, primarily of the people and architecture of Chicago, New York City, and Los Angeles, although she also traveled and photographed worldwide.

During her lifetime, Maier's photographs were unknown and unpublished; many of her negatives were never printed. A Chicago collector, John Maloof, acquired some of Maier's photos in 2007, while two other Chicago-based collectors, Ron Slattery and Randy Prow, also found some of Maier's prints and negatives in her boxes and suitcases around the same time. Maier's photographs were first published on the Internet in July 2008, by Slattery, but the work received little response. In October 2009, Maloof linked his blog to a selection of Maier's photographs on the image-sharing website Flickr, and the results went viral, with thousands of people expressing interest. Maier's work subsequently attracted critical acclaim, and since then, Maier's photographs have been exhibited around the world.

Her life and work have been the subject of books and documentary films, including the film Finding Vivian Maier (2013), which premiered at the Toronto International Film Festival, and was nominated for the Academy Award for Best Documentary Feature at the 87th Academy Awards.

An email address identifies an email box to which email messages are delivered. A wide variety of formats were used in early email systems, but only a single format is used today, following the specifications developed for Internet mail systems since the 1980s. This article uses the term email address to refer to the addr-spec defined in RFC 5322, not to the address that is commonly used; the difference is that an address may contain a display name, a comment, or both.

An email address such as John.Smith@example.com is made up of a local-part, an @ symbol, then a case-insensitive domain. Although the standard requires the local part to be case-sensitive, it also urges that receiving hosts deliver messages in a case-independent fashion, e.g., that the mail system at example.com treat John.Smith as equivalent to john.smith; some mail systems even treat them as equivalent to johnsmith. Mail systems often limit their users' choice of name to a subset of the technically valid characters, and in some cases also limit which addresses it is possible to send mail to.

With the introduction of internationalized domain names, efforts are progressing to permit non-ASCII characters in email addresses.

Fredrick Allen Hampton (August 30, 1948 – December 4, 1969) was an American activist and revolutionary socialist. He came to prominence in Chicago as chairman of the Illinois chapter of the Black Panther Party (BPP), and deputy chairman of the national BPP. In this capacity, he founded a prominent multicultural political organization, the Rainbow Coalition that initially included the Black Panthers, Young Patriots and the Young Lords, and an alliance among major Chicago street gangs to help them end infighting, and work for social change.

In 1967, Hampton was identified by the Federal Bureau of Investigation as a radical threat. The FBI tried to subvert his activities in Chicago, sowing disinformation among these groups and placing a counterintelligence operative in the local Panthers. In December 1969, Hampton was shot and killed in his bed during a predawn raid at his Chicago apartment by a tactical unit of the Cook County State's Attorney's Office in conjunction with the Chicago Police Department and the Federal Bureau of Investigation; during the raid, another Panther was killed and several seriously wounded. In January 1970, a coroner's jury held an inquest and ruled the deaths of Hampton and Mark Clark to be justifiable homicide.

A civil lawsuit was later filed on behalf of the survivors and the relatives of Hampton and Clark. It was resolved in 1982 by a settlement of $1.85 million; the City of Chicago, Cook County, and the federal government each paid one-third to a group of nine plaintiffs. Given revelations about the illegal COINTELPRO program and documents associated with the killings, scholars now widely consider Hampton's death an assassination under the FBI's initiative.

The Leary–Lettvin debate was a May 3, 1967 debate between Dr. Jerome Lettvin, a medical doctor and professor at MIT, and Dr. Timothy Leary, a licensed psychologist, about the merits and dangers of the hallucinogenic drug LSD. It took place in the Kresge Auditorium at the Massachusetts Institute of Technology.

Li Wenliang (Chinese: 李文亮; pinyin: Lǐ Wénliàng; 12 October 1986 – 7 February 2020) was a Chinese ophthalmologist who worked as a physician at Wuhan Central Hospital. Li warned his colleagues in December 2019 about a possible outbreak of an illness that resembled severe acute respiratory syndrome (SARS), later acknowledged as COVID-19. He became a whistleblower when his warnings were later shared publicly. On 3 January 2020, Wuhan police summoned and admonished him for "making false comments on the Internet". Li returned to work, later contracted the virus from an infected patient (who had been originally treated for glaucoma) and died from the disease on 7 February 2020, at age 33. A subsequent Chinese official inquiry exonerated him and the Communist Party formally offered a "solemn apology" to his family and revoked its admonishment of him.

In decision theory, the sure-thing principle states that a decision maker who would take a certain action if he knew that event E has occurred, and also if he knew that the negation of E has occurred, should also take that same action if he knows nothing about E.

The principle was coined by L.J. Savage:

A businessman contemplates buying a certain piece of property. He considers the outcome of the next presidential election relevant. So, to clarify the matter to himself, he asks whether he would buy if he knew that the Democratic candidate were going to win, and decides that he would. Similarly, he considers whether he would buy if he knew that the Republican candidate were going to win, and again finds that he would. Seeing that he would buy in either event, he decides that he should buy, even though he does not know which event obtains, or will obtain, as we would ordinarily say. It is all too seldom that a decision can be arrived at on the basis of this principle, but except possibly for the assumption of simple ordering, I know of no other extralogical principle governing decisions that finds such ready acceptance.

He formulated the principle as a dominance principle, but it can also be framed probabilistically. Richard Jeffrey and later Judea Pearl showed that Savage's principle is only valid when the probability of the event considered (e.g., the winner of the election) is unaffected by the action (buying the property). Under such conditions, the sure-thing principle is a theorem in the do-calculus (see Bayes networks). Blyth constructed a counterexample to the sure-thing principle using sequential sampling in the context of Simpson's paradox, but this example violates the required action-independence provision.

The principle is closely related to independence of irrelevant alternatives, and equivalent under the axiom of truth (everything the agent knows is true). It is similarly targeted by the Ellsberg and Allais paradoxes, in which actual people's choices seem to violate this principle.

Lawsuits against God have occurred in real life and in fiction. Issues debated in the actions include the problem of evil and harmful "acts of God".

Compassion fatigue is a condition characterized by emotional and physical exhaustion leading to a diminished ability to empathize or feel compassion for others, often described as the negative cost of caring. It is sometimes referred to as secondary traumatic stress (STS). According to the Professional Quality of Life Scale, burnout and secondary traumatic stress are two interwoven elements of compassion fatigue.

Compassion fatigue is considered to be the result of working directly with victims of disasters, trauma, or illness, especially in the health care industry. Individuals working in other helping professions are also at risk for experiencing compassion fatigue. These include child protection workers, veterinarians, teachers, social workers, palliative care workers, journalists, police officers, firefighters, animal welfare workers, public librarians, health unit coordinators, and Student Affairs professionals. Non-professionals, such as family members and other informal caregivers of people who have a chronic illness, may also experience compassion fatigue. The term was first coined in 1992 by Carla Joinson to describe the negative impact hospital nurses were experiencing as a result of their repeated, daily exposure to patient emergencies.

People who experience compassion fatigue may exhibit a variety of symptoms including lowered concentration, numbness or feelings of helplessness, irritability, lack of self-satisfaction, withdrawal, aches and pains, or work absenteeism.

Journalism analysts argue that news media have caused widespread compassion fatigue in society by saturating newspapers and news shows with decontextualized images and stories of tragedy and suffering. This has caused the public to become desensitized or resistant to helping people who are suffering.

A zero-rupee note is a banknote imitation issued in India as a means of helping to fight systemic political corruption. The notes are "paid" in protest by angry citizens to government functionaries who solicit bribes in return for services which are supposed to be free. Zero rupee notes, which are made to resemble the regular 50 rupee banknote of India, are the creation of a non-governmental organization known as 5th Pillar which has, since their inception in 2007, distributed over 2.5 million notes as of August 2014. The notes remain in current use and thousands of notes are distributed every month.