He was a professor emeritus of computer science at the University of California, Berkeley, and the director of the Berkeley Initiative in Soft Computing.
He is best known for proposing the fuzzy mathematics in the 1960s.
Fuzzy logic is an approach to computing based on "degrees of truth" rather than the usual "true or false" (1 or 0) Boolean logic on which the modern computer is based.
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Hugh Ching 12:29 07 September 2017
As our friends are listening to our talk about him, Lotfi passed away September 6, 2017 around 7 AM. I praise Lotfi to the limited of my ability in my talk with Dr. Hamilton http://els4.net : He is greater than Turing, where Turing Test is a test of the common sense of the machine, which is exact. Amy and I could be the last two friends, outside his relatively and nurses, to see him Aug. 2, 2017. I deliver to his house big letter Aug. 19: Fuzzy is more accurate than exact. Evolution is fuzzy. Fuzzy Logic is above theory of evolution. Lotfi is greater than Charles. He has fought to live on for us all for three weeks since Aug. 12, 2017, his scheduled and rumored death, after I and Chien Yi Lee saw him for the last time Aug. 2, 2017, over the objection of his relatives and nurse, but with the approval of Lotfi, to encourage him to fight and live on. He shall live in our hearts for another four thousand years.