Question: The slide rule was invented around 1620–1630, shortly after the publication of the concept of the logarithm. It is a hand-operated analog computer for doing multiplication and division. As slide rule development progressed, added scales provided reciprocals, squares and square roots, cubes and cube roots, as well as transcendental functions such as logarithms and exponentials, circular and hyperbolic trigonometry and other functions. Aviation is one of the few fields where slide rules are still in widespread use, particularly for solving time–distance problems in light aircraft. To save space and for ease of reading, these are typically circular devices rather than the classic linear slide rule shape. A popular example is the E6B.
Is there an answer to this question: What is the slide rule used for?

Answer: doing multiplication and division.


Question: In a speech on 24 November 1992, to mark the 40th anniversary of her accession, Elizabeth called 1992 her annus horribilis, meaning horrible year. In March, her second son, Prince Andrew, Duke of York, and his wife, Sarah, separated; in April, her daughter, Princess Anne, divorced Captain Mark Phillips; during a state visit to Germany in October, angry demonstrators in Dresden threw eggs at her; and, in November, a large fire broke out at Windsor Castle, one of her official residences. The monarchy came under increased criticism and public scrutiny. In an unusually personal speech, the Queen said that any institution must expect criticism, but suggested it be done with "a touch of humour, gentleness and understanding". Two days later, the Prime Minister, John Major, announced reforms to the royal finances planned since the previous year, including the Queen paying income tax from 1993 onwards, and a reduction in the civil list. In December, Prince Charles and his wife, Diana, formally separated. The year ended with a lawsuit as the Queen sued The Sun newspaper for breach of copyright when it published the text of her annual Christmas message two days before it was broadcast. The newspaper was forced to pay her legal fees and donated £200,000 to charity.
Is there an answer to this question: In what year did Princess Anne marry Captain Mark Phillips?

Answer: unanswerable


Question: While the decision (with four dissents) ultimately upheld the state law allowing the funding of transportation of students to religious schools, the majority opinion (by Justice Hugo Black) and the dissenting opinions (by Justice Wiley Blount Rutledge and Justice Robert H. Jackson) each explicitly stated that the Constitution has erected a "wall between church and state" or a "separation of Church from State": their disagreement was limited to whether this case of state funding of transportation to religious schools breached that wall. Rutledge, on behalf of the four dissenting justices, took the position that the majority had indeed permitted a violation of the wall of separation in this case: "Neither so high nor so impregnable today as yesterday is the wall raised between church and state by Virginia's great statute of religious freedom and the First Amendment, now made applicable to all the states by the Fourteenth." Writing separately, Justice Jackson argued that "[T]here are no good grounds upon which to support the present legislation. In fact, the undertones of the opinion, advocating complete and uncompromising separation of Church from State, seem utterly discordant with its conclusion yielding support to their commingling in educational matters."
Is there an answer to this question: What did both the majority and dissenting opinions reiterate?

Answer: that the Constitution has erected a "wall between church and state"


Question: On April 20, 2011, Sony shut down the PlayStation Network and Qriocity for a prolonged interval, revealing on April 23 that this was due to "an external intrusion on our system". Sony later revealed that the personal information of 77 million users might have been taken, including: names; addresses; countries; email addresses; birthdates; PSN/Qriocity logins, passwords and handles/PSN online IDs. They also stated that it was possible that users' profile data, including purchase history and billing address, and PlayStation Network/Qriocity password security answers may have been obtained. There was no evidence that any credit card data had been taken, but the possibility could not be ruled out, and Sony advised customers that their credit card data may have been obtained. Additionally, the credit card numbers were encrypted and Sony never collected the three digit CVC or CSC number from the back of the credit cards which is required for authenticating some transactions. In response to the incident, Sony announced a "Welcome Back" program, 30 days free membership of PlayStation Plus for all PSN members, two free downloadable PS3 games, and a free one-year enrollment in an identity theft protection program.
Is there an answer to this question: What was the date Sony shut down the PS Network because of a security breach?

Answer:
April 20, 2011