What is Boolean Logic by vmarcelo

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									   What is Boolean Logic? It is the process of linking topics in order to narrow or
         expand a search through the use of the terms AND, OR, or NOT.

AND links two terms and narrows a search. For example, if you search for "Steroids
 and Sports," only articles containing both terms will be retrieved (as shown by the
                        shaded area in the illustration below).




 OR links two terms and expands a search. For example, if you search for "Cars or
  Autos," articles in which either term appears will be retrieved (as shown in the
                                 illustration below).




NOT narrows a search by excluding articles containing the second search term. For
 example, if you search for "Virus not AIDS," all articles in which "Virus" appears
will be retrieved - except for those also containing the word "AIDS" (as shown in the
                                   illustration below).

								
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