In 1964, Professor Lotfi Zadeh developed the theory of Fuzzy sets. He was the first ones to give this theory a definitive form, though many thinkers historically had pondered on this question of non-crisp sets. Buddha, founder of Buddhism, who lived in India around 500 BC, says that world is stuffed with contradictions and almost everything contains its opposite, i.e things can end up being a or not-A at once. Bertrand Russell had encountered this regarding fuzziness when he stated his paradox.<br> <br> <br> <br> <br> <br> <br> <br>