Artificial intelligent assistant

inerasable

inerasable, a.
  (ɪnɪˈreɪsəb(ə)l, -ˈreɪz-)
  Also -ible.
  [in-3.]
  That cannot be erased, expunged, or effaced. Hence ineˈrasably (-ibly) adv.

1811 Shelley St. Irvyne iv. Pr. Wks. 1888 I. 160 What man of honour needs a moment's rumination to discover what nature has so inerasibly implanted in his bosom—the sense of right and wrong? 1811Let. 17 May (1964) I. 90 Nor do I think her Xtianity of the most inerasible nature. 1812Proposals ibid. 280 Men whose names are inerasable from the records of Liberty. 1885 L. Saunders R. Boyle ii. 34 An ink perfectly inerasable.

Oxford English Dictionary

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