willingness to re-evaluate
Original Dramatica Definition
Openness simply means entertaining alternatives. When a character's pre-conceptions come into conflict with new information, if he is open, he will not be biased or blind to it. He puts openness above holding on to a point of view. Of course, this can easily be carried to extremes, when someone seems to have no opinion at all and just goes with whatever anyone else says. Some degree of pre-conception is necessary to benefit from the value of one's own experience.
syn. broad mindedness, tolerancy, willingness to reevaluate, receptiveness