suppositional
 (a.)想象的,推測的,推想的
 Sup·po·si·tion·al a. Resting on supposition; hypothetical; conjectural; supposed.
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 suppositional
      adj : based primarily on surmise rather than adequate evidence;
            "theories about the extinction of dinosaurs are still
            highly conjectural"; "the supposed reason for his
            absence"; "suppositious reconstructions of dead
            languages"; "supposititious hypotheses" [syn: conjectural,
             divinatory, supposed, suppositious, supposititious]