Problem: BBC Television:

Initially, the station's range was officially a 40 kilometres radius of the Alexandra Palace transmitter—in practice, however, transmissions could be picked up a good deal further away, and on one occasion in 1938 were picked up by engineers at RCA in New York, who were experimenting with a British television set.

What were engineers experimenting with in Alexandra?
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A: unanswerable


Problem: Dog:

The domestic dog (Canis lupus familiaris or Canis familiaris) is a domesticated canid which has been selectively bred for millennia for various behaviors, sensory capabilities, and physical attributes.

What is Canis familiaris?
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A: domestic dog


Problem: Textual criticism:

Brooke Foss Westcott (1825–1901) and Fenton J. A. Hort (1828–1892) published an edition of the New Testament in Greek in 1881. They proposed nine critical rules, including a version of Bengel's rule, "The reading is less likely to be original that shows a disposition to smooth away difficulties." They also argued that "Readings are approved or rejected by reason of the quality, and not the number, of their supporting witnesses", and that "The reading is to be preferred that most fitly explains the existence of the others."

What is the criteria needed to include or dismiss a reading when critiquing texts?
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A: The reading is to be preferred that most fitly explains the existence of the others.


Problem: Frédéric Chopin:

Over 230 works of Chopin survive; some compositions from early childhood have been lost. All his known works involve the piano, and only a few range beyond solo piano music, as either piano concertos, songs or chamber music.

How many of Chopin's works still exist?
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A:
Over 230