Sources of Uncertainty

  • Jerry M. Mendel


This chapter examines the kinds of uncertainties that motivate the use of type-2 fuzzy sets and systems. Its coverage includes general discussions about the occurrence, causes, and nature of uncertainty, uncertainties and sets, uncertainties in a fuzzy system, and collecting word data from a group of subjects to demonstrate that words mean different things to different people. It is demonstrated that uncertainty is a commodity that can be used to control the rule explosion that is so common in a fuzzy system.


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© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.University of Southern CaliforniaLos AngelesUSA

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