Artificial intelligent assistant

explanandum

explanandum Philos.
  (ɛkspləˈnændəm)
  Pl. explananda.
  [L., neut. of gerundive of explānāre: see explain v.]
  The thing to be explained. Cf. explicandum.

1892 Academy 6 Aug. 114/2 Whenever a psychical explanandum is run to earth in some feature of nerve structure or function, the pursuit is over. 1948, 1962 [see explanans]. 1964 I. Scheffler Anat. Inquiry 29 This account construes every explanation as consisting of an explanandum..and an explanans.

Oxford English Dictionary

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