The best replacement for fuzzy logic is pid.

The best alternatives to fuzzy logic are rated as following:
★★★★★  pid
★★★★  probability
★★★★  neural network
★★  boolean logic
★★  probability theory
★★  neuro fuzzy
★  conventional logic
★  induction rice cooker
★  pid controller
★  crisp logic
  neural networks
  binary logic
  bayesian network
  pid control
  genetic algorithm
  expert system
  classical logic

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Speaking about fuzzy logic, one probably shouldn't forget about neural networks.

Other search terms related to fuzzy logic and their ratings are:
★★★★★ neural networks
★★★★ genetic algorithm
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fuzzy logic
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