Question: In the Al-Burhan (On Demonstration) section of The Book of Healing, Avicenna discussed the philosophy of science and described an early scientific method of inquiry. He discusses Aristotle's Posterior Analytics and significantly diverged from it on several points. Avicenna discussed the issue of a proper methodology for scientific inquiry and the question of "How does one acquire the first principles of a science?" He asked how a scientist would arrive at "the initial axioms or hypotheses of a deductive science without inferring them from some more basic premises?" He explains that the ideal situation is when one grasps that a "relation holds between the terms, which would allow for absolute, universal certainty." Avicenna then adds two further methods for arriving at the first principles: the ancient Aristotelian method of induction (istiqra), and the method of examination and experimentation (tajriba). Avicenna criticized Aristotelian induction, arguing that "it does not lead to the absolute, universal, and certain premises that it purports to provide." In its place, he develops a "method of experimentation as a means for scientific inquiry."
Is there an answer to this question: What method did Avicenna support as leading to absolute certainty?

Answer: unanswerable


Question: The city of Nanjing was razed after the Sui dynasty took over it. It renamed Shengzhou (昇州) in Tang dynasty and resuscitated during the late Tang. It was chosen as the capital and called Jinling (金陵) during the Southern Tang (937–976), a state that succeeded Wu state. It renamed Jiangning (江寧) in Northern Song dynasty and renamed Jiankang in Southern Song dynasty. Jiankang's textile industry burgeoned and thrived during the Song dynasty despite the constant threat of foreign invasions from the north by the Jurchen-led Jin dynasty. The court of Da Chu, a short-lived puppet state established by the Jurchens, and the court of Song were once in the city. Song was eventually exterminated by the Mongol empire under the name Yuan and in Yuan dynasty the city's status as a hub of the textile industry was further consolidated.
Is there an answer to this question: Who defeated the court of Song?

Answer: the Mongol empire


Question: In September 1975, Gaddafi purged the army, arresting around 200 senior officers, and in October he founded the clandestine Office for the Security of the Revolution. In 1976, student demonstrations broke out in Tripoli and Benghazi, and were attacked by police and Gaddafist students. The RCC responded with mass arrests, and introduced compulsory national service for young people. Dissent also arose from conservative clerics and the Muslim Brotherhood, who were persecuted as anti-revolutionary. In January 1977, two dissenting students and a number of army officers were publicly hanged; Amnesty International condemned it as the first time in Gaddafist Libya that dissenters had been executed for purely political crimes.
Is there an answer to this question: How many students were executed in January of 1977?

Answer: two


Question: In the 1990s two icons by the Russian icon painter Sergei Fyodorov were hung in the abbey. On 6 September 1997 the funeral of Diana, Princess of Wales, was held at the Abbey. On 17 September 2010 Pope Benedict XVI became the first pope to set foot in the abbey.
Is there an answer to this question: What nationality was Sergei Fyodorov?

Answer:
Russian