Classical Logic or Boolean Logic.
In Digital binary system based on classical logic we normally work with ‘1’ or ‘0’.
How human define the limit in Classical Logic ?
In Classical Boolean Logic depends on designer how to select the limits.
Lofti Zadeh, Father of Fuzzy Logic (1965).
Fuzzy Logic is determined as a set of mathematical principles for knowledge representation based on degrees of membership rather than on crisp membership of classical binary logic.
Fuzzy Logic is multi-valued compared with the Boolean Logic which accepts only two values.
A Fuzzy System can be divided in
(2) Fuzzy Rules
(3) Inference Engine