The best replacement for hume is kant.

The best alternatives to hume are rated as following:
★★★★★  kant
★★★★  descartes
★★★  locke
★★  aristotle
★★  hobbes
★  plato
★  paley
★  reid
★  rousseau
★  aquinas
  searle
  berkeley
  immanuel kant
  juan williams
  descartes skepticism
  nietzsche
  john locke
  rene descartes
  ayer
  elvaan
  galco

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Speaking about hume, one probably shouldn't forget about paul ryan.

Other search terms related to hume and their ratings are:
★★★★★ paul ryan
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hume
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