Fuzzy logic as such didn't really go anywhere, just as predicted by actual scientists and engineers. Zadeh was widely cited, but with little real-world "impact factor" outside the context of the journals themselves.<p>Still, I suspect that's because the core idea was ahead of its time. Fuzzy logic attacked problems that already had conventional solutions. You don't actually need fuzzy logic to minimize the time derivatives of position when starting or stopping an elevator, or to run an electric razor, or to do constraint minimization with linear programming, or in any number of other commonly-cited applications. But if you were to pin down a member of the AlphaGo team and ask him or her exactly how the machine beat Lee Sedol, the answer you'll get is going to sound a lot like "fuzzy logic," in the sense that our machines and the algorithms they implement are reaching a point where they're no longer entirely accountable to their human programmers, or understandable by them.<p>That makes me think that in another 50 years Zadeh's reputation may look somewhat different than it does today.