supposition

supposition (http://definr.com/supposition)

     n 1: a message expressing an opinion based on incomplete evidence
          [syn: guess, conjecture, surmise, surmisal, speculation,
           hypothesis]
     2: a hypothesis that is taken for granted; "any society is
        built upon certain assumptions" [syn: assumption, supposal]
     3: the cognitive process of supposing [syn: supposal]