Type of mathematical logic, which takes its name from the fuzzy or uncertain attribute; in fact the variables, unlike the Boolean logic, can assume distribution of variable values, to which levels of possibility can be associated more than certain or deterministic levels; therefore, even the results of the calculations carried out according to this theory, in analogy to characteristics proper to human reasoning, may have different degrees of certainty. Conceptually different from the simple statistical calculation, this type of logic can be applied in expert systems and in diagnostics
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