Artificial intelligent assistant

impugner

impugner
  (ɪmˈpjuːnə(r))
  [f. impugn v. + -er1.]
  One who impugns or assails.

1539 Tonstall Serm. Palm Sund. (1823) 51 Redye to defende the faith ageynst the impugners of it. a 1688 Cudworth Immut. Mor. (1731) 223 Some of these Strenuous Impugners of Immaterial and Incorporeal Substances. 1712 Berkeley Passive Obed. §38 A..prejudice which influenceth the impugners of non-resistance. 1818 Hazlitt Eng. Poets iii. (1870) 80 The way to defend Milton against all impugners is to take down the book and read it. 1890 Spectator 6 Sept., The impugners of the story..have failed to support their scepticism with anything that can properly be called evidence.

Oxford English Dictionary

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