plausibly

from WordNet (r) 3.0 (2006)

plausibly
    adv 1: easy to believe on the basis of available evidence; "he
           talked plausibly before the committee"; "he will probably
           win the election" [syn: {credibly}, {believably},
           {plausibly}, {probably}] [ant: {implausibly},
           {improbably}, {incredibly}, {unbelievably}]

from The Collaborative International Dictionary of English v.0.48

Plausibly \Plau"si*bly\, adv.
   1. In a plausible manner.
      [1913 Webster]

   2. Contentedly, readily. [Obs.]
      [1913 Webster]

            The Romans plausibly did give consent. --Shak.
      [1913 Webster]

[email protected]