When you make a claim that is extraordinary, the bar for “sufficient” evidence is higher. Hence the use of the word “extraordinary” evidence. Perhaps our disagreement is just semantic.
If your son told you he had heard a person screaming in the house next door, you could believe him without any hint of doubt. If your son told you that aliens had abducted him in the night, you most likely would not believe him even if the story were confirmed by a friend of his. Such skepticism is reasonable because you haven’t been provided with sufficient evidence. You would need a remarkable amount of evidence for it to be reasonable to believe your son, in this instance.
(Note: years of evidence that your son is reliable and trustworthy would go a long way, however. I don’t think “extraordinary” evidence need always be miraculous. I always take the phrase to mean “an extraordinary amount of evidence”, not “evidence of an extraordinary sort”).
Do we disagree, or is this semantics?