Artificial intelligent assistant

controverser

ˈcontroverser Obs.
  Also -or.
  [f. controverse v. + -er1.]
  One engaged in controversy; a controversialist.

1620 Bp. Hall Hon. Mar. Clergy 29 (T.) Which place, boulted before to the bran by many controversers, etc. 1625 Bp. R. Montagu App. Cæsar. ix. 91 Sine Dei gratia..saith the controversor. a 1670 Hacket Cent. Serm. (1675) 153 This opinion their Cardinal Controverser disavows.

Oxford English Dictionary

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