It is, I am surprised it is a word.
unfactual
unfactual - Moby Thesaurus II by Grady Ward, 1.0 (?)
62 Moby Thesaurus words for "unfactual":
aberrant, abroad, adrift, all abroad, all off, all wrong, amiss,
approximate, approximative, askew, astray, at fault, awry,
beside the mark, corrupt, deceptive, defective, delusive, deviant,
deviational, deviative, distorted, errant, erring, erroneous,
fallacious, false, faultful, faulty, flawed, heretical, heterodox,
illogical, illusory, imprecise, inaccurate, incorrect, inexact,
lax, loose, negligent, not right, not true, off, off the track,
out, out of line, out of plumb, out of square, out of true,
peccant, perverse, perverted, self-contradictory, straying,
unorthodox, unprecise, unproved, unrigorous, untrue, wide, wrong