The “default” logical connection between terms entered in Google is an “AND.” When you enter two different words in Google, there is an implied Boolean connection between the two words. You use Boolean logic in your web searches without realizing it. The relationship between terms connected by Boolean logic are represented in this diagram: However, with the advent of computing, computer developers realized that Boolean logic, which had little practical use in the 19th Century, was ideal when applied to searching computerized databases.īoolean logic uses three ‘logical operators’ to represent relationships between terms and define what a search should find. It was of little interest to anyone at that time, as it dealt with pure logic, and was mostly forgotten. Mathematician George Boole invented Boolean logic with the publication of the system in a thesis in 1854. Boolean logic is the phrase used to describe the system that applies to electronic search logic. That is, knowing how the words you type into a search relate to each other is important because your decisions about how to enter the terms will greatly affect the results. Strategic searching in databases requires constructing a “search equation” that details the relationship between the words you use.
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