Artificial intelligent assistant

opinial

† oˈpinial, a. Obs. rare—1.
  [f. stem opīni- (see opiniate a.) + -al1.]
  = opinional.

c 1450 Pecock Treat. Rule Faith (1688) 3 There ben two maners of feith: oon is opinial feith... Another feith is sciencial feith.

Oxford English Dictionary

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