What Might make one person's story more believable than another person's ?

Facts and an unchanging storyline over opinions and an argument using emotions.

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;