I'm looking for a book containing a specific scene. I don't remember exactly when I read it, but it was at least 10 years ago. The scene is largely unrelated to the main events of the book, and I don't remember what the rest of the book was about. This also means it wouldn't show up in a plot summary.
A young girl is being held in a research facility, or something similar. She has the unusual ability to know the current NYSE stock prices, with no delay. This was before the modern internet, so I believe "normally" you'd need to wait for the next day's newspaper - so it's information she couldn't possibly know, but not predictions that could be used to exploit the stock market. This girl is being studied to try and figure out how she gets the prices, but there's no real explanation - i.e. she's isolated, shielded from any kind of radio waves or contact with outside people, the staff are rotated out to ensure they aren't in on the "scam", etc.
I believe there are other children, with similar abilities, such as a boy that can describe the current events of a television show without access to a receiver - completely inexplicable, but also completely useless.
The "moral" of this scene was that there were two explanations for these abilities: the implausible (someone is going through a lot of effort to trick us for no benefit) or the impossible (magic exists; or fortune telling is real; or something similarly fantastical that most people would flat out dismiss as nonsense), and it is the impossible explanation that is actually more likely. I don't remember the exact reasoning used here, which is why I want to re-read the book.
The main character (I think a woman, 20-30 years old) is not related to this research center and is guided there/discovers it due to their own seemingly-impossible circumstances. This scene served to guide the main character's thought process to consider the obvious explanation, despite it being impossible. I don't remember the unusual event was, but I vaguely recall Thor being involved. It was definitely something fantastical in an otherwise mundane world, i.e. there's no overt magic, the gods don't walk among us.
It's been so long I'm sure I have details mixed up, and may have the Thor connection jumbled with some other media. I'm not positive about any of the genders or ages. It's definitely a very minor scene in the overall book, but it's the only thing I remember.