Boolean logic is derived from a system used to manipulate sets in mathematics.
It is named after English Mathematician George Boole, who developed the system. Because of the creation of sets in online searching Boolean logic is deemed the best way to inc lude, exclude or combine these sets to retrieve the desired information. The English language is filled with ambiguities, shades of meaning and duplicative uses of words. Because of this we must try to narrow our search focus to be as accurate as possible in our retrieval. Another important thing to remember is that words sta nd for concepts that mean many different things to many different indexers.