Artificial intelligent assistant

unopposable

unoˈpposable, a.
  (un-1 7 b.)

1667 Waterhouse Fire Lond. 60 Illiterate men Apostoliz'd and made by him unopposable. 1802–12 Bentham Ration. Judic. Evid. (1827) IV. 151 The application is either opposable or unopposable.

Oxford English Dictionary

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