![]() ![]() You see it daily at your favorite cafe: “I’d like an iced, dairy-free latte with a double shot of espresso.” The combination of these variables “iced” AND “dairy-free” AND “latte” AND “double shot of espresso” produces the true result. I may be curious about the tavern, but I will go somewhere else for a cold, caffeinated beverage.īoolean logic can become infinitely more complicated to produce a specific result. But if even one of these is false (the tavern doesn’t sell caffeinated drinks OR they don’t have cold drinks because their ice machine is broken) then the total output is false. “Caffeine” becomes a second variable in this equation: “IF (cold drink) AND (caffeine), then I will buy a drink at the tavern.” If both of these are true, then the output is true, meaning I will go to the tavern and buy a drink. Now, because I am tired, the drink must also contain caffeine. Here, “cold drink” can be the first variable in an equation: “If I can purchase a cold drink, then I will go to the tavern.” As long as the tavern sells drinks that are not hot, you have a variety of drink options to choose from. Here’s an everyday example: I want a cold drink. He believed that every piece of variable data could be fit into one of two categories: “true” or “false”, with nothing in the middle. Boole did this by putting formal logic into mathematical form. A 19th century English mathematician and logician, Boole initially intended to provide a foundation for and extend the applicability of Aristotelian logic. While it may sound exotic or mythical, Boolean logic was simply named after the man who developed it, George Boole. To effectively conduct a Boolean search, it helps to first understand Boolean logic. Boolean OperatorĮach search result will contain both the terms falls AND agedĮach search result will contain either (or both) of the terms falls OR agedĮach search result will contain both the terms falls AND aged but only if they do NOT contain the third term homeīoolean logic uses the terms AND, OR and NOT to combine concepts.Are you a job seeker? Find jobs. ![]() Now test your understanding in the next example by identifying how the results would appear and then clicking on the answer symbol to check your answer. Boolean OperatorĬombine keywords that reflect different conceptsĮach search result will contain both the terms art and therapyĬombine keywords that reflect similar conceptsĮach search result will contain either (or both) of the terms art or therapyĮach search result will contain both the terms art and therapy but only if they do not contain the third term children ![]() Use brackets when using Boolean Operators such as ‘(art AND therapy) NOT children’ so that the database will only look for articles about art and therapy but exclude those that mention children. Using NOT excludes information not required and reduces the number of resultsīrackets are used to define the order in which the concepts are processed.Using OR searches a broader range of keywords and increases the number of results.Using AND narrows the search and decreases the number of results.The most commonly used Boolean Operators are AND, OR, and NOT. ![]() Combining terms with Boolean Operators (AND, OR, NOT)īoolean Operators are specific words used to combine concepts or keywords to improve the chances of finding relevant information. ![]()
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