contrary to reason

absurd futile hopeless impassable impractical inaccessible inconceivable insurmountable preposterous unattainable unimaginable unreasonable unthinkable unworkable useless

visionary

beyond cureless hardly possible hundred-to-one impervious impracticable inexecutable infeasible irrealizable irreparable no-go no-win not a prayer out of the question too much unachievable uncorrectable unfeasible unobtainable unrecoverable way-out

believable conceivable hopeful imaginable logical practical reasonable sensible

achievable obtainable possible

futile hopeless impassable impervious impractical inaccessible inconceivable insurmountable unimaginable unreasonable unthinkable unworkable useless

absurd beyond cureless hardly possible hundred-to-one impracticable inexecutable infeasible irrealizable irreparable no-go no-win not a prayer out of the question preposterous too much unachievable uncorrectable unfeasible unobtainable unrealizable unrecoverable visionary way-out

believable conceivable hopeful imaginable open practical reasonable sensible

absurd beyond cureless futile hardly possible hopeless hundred-to-one impassable impervious impracticable impractical inaccessible inconceivable inexecutable infeasible insurmountable irrealizable irreparable no-go no-win not a prayer out of the question preposterous too much unachievable unattainable uncorrectable unfeasible unimaginable unobtainable unreasonable unrecoverable unthinkable unworkable useless visionary way-out

absurd futile impassable impractical unattainable unreasonable unthinkable useless

beyond cureless hardly possible hopeless hundred-to-one impervious impracticable inaccessible inconceivable inexecutable infeasible insurmountable irrealizable irreparable no-go no-win not a prayer out of the question preposterous too much unachievable uncorrectable unfeasible unimaginable unobtainable unrealizable unrecoverable visionary way-out

logical practical reasonable sensible