Artificial intelligent assistant

refragate

refragate, v. Obs.
  [f. L. refragāt-, ppl. stem of refragārī to resist, withstand.]
  intr. To oppose, controvert, gainsay.

1593 Nashe Christ's T. (1613) 119 Stoutly they refragate and withstand, that the Firmament is not his handy-worke. 1623 Cockeram, Refragate, to gainesay. 1661 Glanvill Van. Dogm. 179 If upon further enquiry, any were found to refragate, they were to be discharg'd by a distinction.

Oxford English Dictionary

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