All assassins had a full-length mirror in their rooms, because it would be a terrible insult to anyone to kill them when you were badly dressed.
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Logarithm (Wikipedia)In mathematics, the logarithm is the inverse function to exponentiation. That means that the logarithm of a number x to the base b is the exponent to which b must be raised to produce x. For example, since 1000 = 10^3, the logarithm base 10 of 1000 is 3, or log10 (1000) = 3. The logarithm of x to base b is denoted as logb (x), or without parentheses, logb x, or even without the explicit base, log x, when no confusion is possible, or when the base does not matter such as in big O notation.
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Pyramids (novel) (Wikipedia)Pyramids is a fantasy novel by British writer Terry Pratchett, published in 1989, the seventh book in his Discworld series. It won the BSFA Award for Best Novel in 1989.