Answer and Explanation:
The stories that are easiest to believe are the ones that seem more rational and normal to happen, in addition to showing evidence that they are true and to be told by a reliable person. On the other hand, the stories most difficult to believe are those that seem very unrealistic and irrational, with little evidence and are told by someone who is not trustworthy.
The main difference between the stories I can trust without question and those that make me suspicious is the amount of evidence presented, as the evidence is essential to promote the story's veracity.