doublethink

from WordNet (r) 3.0 (2006)

doublethink
    n 1: believing two contradictory ideas at the same time

from Moby Thesaurus II by Grady Ward, 1.0

22 Moby Thesaurus words for "doublethink":
      Janus, ambiguity, ambivalence, biformity, bifurcation, conjugation,
      dichotomy, doubleness, doubling, dualism, duality, duplexity,
      duplication, duplicity, equivocality, halving, irony, pairing,
      polarity, twinning, two-facedness, twoness