Problem: Alfred North Whitehead:

The ultimate substantive legacy of Principia Mathematica is mixed. It is generally accepted that Kurt Gödel's incompleteness theorem of 1931 definitively demonstrated that for any set of axioms and inference rules proposed to encapsulate mathematics, there would in fact be some truths of mathematics which could not be deduced from them, and hence that Principia Mathematica could never achieve its aims. However, Gödel could not have come to this conclusion without Whitehead and Russell's book. In this way, Principia Mathematica's legacy might be described as its key role in disproving the possibility of achieving its own stated goals. But beyond this somewhat ironic legacy, the book popularized modern mathematical logic and drew important connections between logic, epistemology, and metaphysics.

 Who discovered the incompleteness theorem of 1961?
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A: unanswerable


Problem: Typically, the warmest day of the year (1971–2000) will achieve a temperature of 26.6 °C (80 °F), although in June 1976 the temperature reached 31.6 °C (89 °F), the site record. On average, 4.25 days of the year will report a maximum temperature of 25.1 °C (77 °F) or above. During the winter half of the year, the coldest night will typically fall to −4.1 °C (25 °F) although in January 1979 the temperature fell to −8.8 °C (16 °F). Typically, 18.6 nights of the year will register an air frost.
In degrees Celsius, what was the coldest temperature recorded at Plymouth between 1971 and 2000?
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Answer: −8.8 °C


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In September 1828 Chopin, while still a student, visited Berlin with a family friend, zoologist Feliks Jarocki, enjoying operas directed by Gaspare Spontini and attending concerts by Carl Friedrich Zelter, Felix Mendelssohn and other celebrities. On an 1829 return trip to Berlin, he was a guest of Prince Antoni Radziwiłł, governor of the Grand Duchy of Posen—himself an accomplished composer and aspiring cellist. For the prince and his pianist daughter Wanda, he composed his Introduction and Polonaise brillante in C major for cello and piano, Op. 3.
In 1829 on a trip back to Berlin Chopin was a guest of who?
A: Prince Antoni Radziwiłł


Context and question: Among the philosophies that have influenced modern architects and their approach to building design are rationalism, empiricism, structuralism, poststructuralism, and phenomenology.
 Rationalism and empiricism are not examples of what?
Answer: unanswerable


Question: In the early morning of 10 April, leading elements of the Austrian army crossed the Inn River and invaded Bavaria. The early Austrian attack surprised the French; Napoleon himself was still in Paris when he heard about the invasion. He arrived at Donauwörth on the 17th to find the Grande Armée in a dangerous position, with its two wings separated by 75 miles (121 km) and joined together by a thin cordon of Bavarian troops. Charles pressed the left wing of the French army and hurled his men towards the III Corps of Marshal Davout. In response, Napoleon came up with a plan to cut off the Austrians in the celebrated Landshut Maneuver. He realigned the axis of his army and marched his soldiers towards the town of Eckmühl. The French scored a convincing win in the resulting Battle of Eckmühl, forcing Charles to withdraw his forces over the Danube and into Bohemia. On 13 May, Vienna fell for the second time in four years, although the war continued since most of the Austrian army had survived the initial engagements in Southern Germany.
Is there an answer to this question: What was the name of the plan Napoleon devised to cut off the Austrians during battle?

Answer: Landshut Maneuver


Question: The NES dropped the hardwired controllers, instead featuring two custom 7-pin ports on the front of the console. Also in contrast to the Famicom, the controllers included with the NES were identical to each other—the second controller lacked the microphone that was present on the Famicom model and possessed the same START and SELECT buttons as the primary controller. Some NES localizations of games, such as The Legend of Zelda, which required the use of the Famicom microphone in order to kill certain enemies, suffered from the lack of hardware to do so.
Is there an answer to this question: How many pins did the controller ports have on the NES?

Answer:
7