Problem: Police:

Law enforcement, however, constitutes only part of policing activity. Policing has included an array of activities in different situations, but the predominant ones are concerned with the preservation of order. In some societies, in the late 18th and early 19th centuries, these developed within the context of maintaining the class system and the protection of private property. Many police forces suffer from police corruption to a greater or lesser degree. The police force is usually a public sector service, meaning they are paid through taxes.

How are police never paid?
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A: unanswerable


Problem: Group (mathematics):

Two groups G and H are called isomorphic if there exist group homomorphisms a: G → H and b: H → G, such that applying the two functions one after another in each of the two possible orders gives the identity functions of G and H. That is, a(b(h)) = h and b(a(g)) = g for any g in G and h in H. From an abstract point of view, isomorphic groups carry the same information. For example, proving that g • g = 1G for some element g of G is equivalent to proving that a(g) ∗ a(g) = 1H, because applying a to the first equality yields the second, and applying b to the second gives back the first.

How can showing the second equality yields the first prove the concept of isomorphic groups?
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A: applying a to the first equality yields the second


Problem: Plymouth:

A 2014 profile by the National Health Service showed Plymouth had higher than average levels of poverty and deprivation (26.2% of population among the poorest 20.4% nationally). Life expectancy, at 78.3 years for men and 82.1 for women, was the lowest of any region in the South West of England.

As of 2014, what was the life expectancy of male Plymouth residents?
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A: 78.3 years


Problem: Wayback Machine:

Snapshots usually become available more than six months after they are archived or, in some cases, even later; it can take twenty-four months or longer.  The frequency of snapshots is variable, so not all tracked web site updates are recorded. Sometimes there are intervals of several weeks or years between snapshots.

How long are intervals between cases?
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A:
unanswerable