Its been years but I once used the analogy of the Goldilocks and Three Bears story. Every story has to have some internal logic and continuity for it to be entertaining or even to be understood. My arguing that the story includes the factual sounding details that bears will eat porridge and that girls can break chairs too small for them, does not lead most people to conclude the fanciful aspects of the story to likewise be true.
Its the fanciful aspects of the story that require corroboration and demonstration. Talking bears cooking porridge in a house for example. Those who would argue for acceptance of the 3 Bears story have much to overcome.
Someone skeptical of the 3 Bears story might likely ask who wrote it and when. When research reveals that there were multiple versions of the story written by different authors and yet the primary source of the story are unknown a reasonable person would not likely find that reassuring. Goldilocks and the Three Bears - Wikipedia