impossible visionary futuristic imaginative wise heroic egotistical inconceivable illogical Absurd Unbelievable unlikely hopeless problematical problematic impractical futile unattainable incredible insoluble unrealizable undoable useless absurd impracticable insuperable unsolvable insolvable infeasible questionable improbable unfeasible unworkable dubious unusable unthinkable ridiculous unbelievable fantastical implausible unimaginable doubtful debatable suspicious suspect shaky disputable fishy far-fetched fantastic outlandish shady preposterous doubtable