A Boolean is a variable that can only attain two values: True or False. In most applications, it is convenient to represent a True by the number 1, and a False by the number 0. A Boolean model, or Boo...A Boolean is a variable that can only attain two values: True or False. In most applications, it is convenient to represent a True by the number 1, and a False by the number 0. A Boolean model, or Boolean network, is a collection of Boolean variables that are related by logical switching rules, or Boolean functions, that follow an If-Then format. This type of Boolean model is known as an autonomous model and will be the primary type of model discussed in this article.