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Boolean algebra and nodes  

Definition

  • A Boolean, or logical, variable is one that can take the values T (true) or F (false); and the Boolean, or logical, algebra pioneered by George Boole (1815–1864) holds the formal machinery that allows such truth values to be logically combined. Boolean principles offer a framework for handling questionnaire and symptom data of the common binary kind (yes vs. [Source: Encyclopedia of Medical Decision Making; Boolean Algebra and Nodes]

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https://concepts.sagepub.com/social-science/concept/Boolean_algebra_and_nodes

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