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Fuzzy systems are based on the mathematics of linguistics. They are used to capture ideas such as "close" and "heavy," which are subject to interpretation and may not be immediately suitable for distilling into an algorithm. These logic systems are often applied to control problems where a rule might be, "Push firmly on the yoke as you get near 1000 feet in altitude." Such a rule is far more useful than something like "push on the yoke with a force of 1.2 Newtons when you reach 991.2 feet in altitude." Fuzzy logic provides a means for handling imprecise statements so that they can be interpreted by both the computer and the human expert.
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