Artificial intelligent assistant

supererogator

supeˈrerogator rare.
  [f. supererogate v. + -or.]
  One who performs works of supererogation.

1679 Let. Vind. Ref. Ch. 9 These horrid Supererogators do seem..to out-act the most Holy Law-giver. 1826 Westm. Rev. Jan. 34 Man is not here a mere supererogator, an unbidden counsellor.

Oxford English Dictionary

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