implausibleness

from WordNet (r) 3.0 (2006)

implausibleness
    n 1: the quality of provoking disbelief [syn: {implausibility},
         {implausibleness}] [ant: {plausibility}, {plausibleness}]

from The Collaborative International Dictionary of English v.0.48

Implausible \Im*plau"si*ble\, a. [Pref. im- not + plausible: cf.
   F. implausible.]
   Not plausible; not wearing the appearance of truth or
   credibility, and not likely to be believed. "Implausible
   harangues." --Swift. -- {Im*plau"si*ble*ness}, n. --
   {Im*plau"si*bly}, adv.
   [1913 Webster]