The Free On-line Dictionary of Computing (30 December 2018):

liar paradox

    A sentence which asserts its own falsity,
   e.g. "This sentence is false" or "I am lying".  These
   paradoxical assertions are meaningless in the sense that there
   is nothing in the world which could serve to either support or
   refute them.  Philosophers, of course, have a great deal more
   to say on the subject.

   ["The Liar: an Essay on Truth and Circularity", Jon Barwise
   and John Etchemendy, Oxford University Press (1987). ISBN
   0-19-505944-1 (PBK), Library of Congress BC199.P2B37].

   (1995-02-22)