Нечеткая логика — многозначная логика, в которой истинность может выражаться степенями между полностью ложным и полностью истинным. Она полезна для рассуждения о размытых, приближенных или языковых понятиях, а не о строгих бинарных категориях.
A simple form for the many-valued logic, in which the truth values of variables may have any degree of "Truthfulness" that can be represented by any real number in the range between 0 (as in Completely False) and 1 (as in Completely True) inclusive. Consequently, It is employed to handle the concept of partial truth, where the truth value may range between completely true and completely false. In contrast to Boolean logic, where the truth values of variables may have the integer values 0 or 1 only.