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2. Page replacement algorithm - Wikipedia

   en.wikipedia.org/wiki/Page_replacement_algorithm

   The theoretically optimal page replacement algorithm (also known as OPT, clairvoyant replacement algorithm, or Bélády's optimal page replacement policy) [3] [4] [2] is an algorithm that works as follows: when a page needs to be swapped in, the operating system swaps out the page whose next use will occur farthest in the future. For example, a ...

3. Chernobyl Nuclear Power Plant sarcophagus - Wikipedia

   en.wikipedia.org/wiki/Chernobyl_Nuclear_Power...

   The Chernobyl Nuclear Power Plant sarcophagus or Shelter Structure (Ukrainian: Об'єкт "Укриття", romanized: Ob'yekt "Ukryttya", Russian: Объект «Укрытие», romanized: Ob"yekt «Ukrytiye») is a massive steel and concrete structure covering the nuclear reactor number 4 building of the Chernobyl Nuclear Power Plant.

4. Canopy (architecture) - Wikipedia

   en.wikipedia.org/wiki/Canopy_(architecture)

   Canopy over a doorway in Fergana, Uzbekistan Canopied entrance to the New York City Subway at the 14th Street–Union Square station. A canopy is a type of overhead roof or else a structure over which a fabric or metal covering is attached, able to provide shade or shelter from weather conditions such as sun, hail, snow and rain.

5. Material implication (rule of inference) - Wikipedia

   en.wikipedia.org/wiki/Material_implication_(rule...

   In propositional logic, material implication [1] [2] is a valid rule of replacement that allows a conditional statement to be replaced by a disjunction in which the antecedent is negated. The rule states that P implies Q is logically equivalent to not- P {\displaystyle P} or Q {\displaystyle Q} and that either form can replace the other in ...

6. Replaceability argument - Wikipedia

   en.wikipedia.org/wiki/Replaceability_argument

   Animal rights writer Henry S. Salt termed the replaceability argument the "logic of the larder".. In 1789, the utilitarian philosopher Jeremy Bentham endorsed a variant of the argument, contending that painlessly killing a nonhuman animal is beneficial for everyone because it does not harm the animal and the consumers of the meat produced from the animal's body are better off as a result.