Is this a valid inference?

That doesn’t read as a complete thought to me, but that doesn’t really guarantee that other people won’t read it that way. I’d edit in something clearer if I could, but for now I’ll just count it as a lesson learned.

I also see two interpretations, but one of them is different:

  1. If you learn that someone is an organ player, does that make them more likely to be a vampire than someone who doesn’t [play the organ]?
  2. If you learn that someone is an organ player, does that make them more likely to be a vampire than someone who doesn’t [learn that someone is an organ player]?

The first is P(V|O) >? P(V|-O), while the second is P(V|O) >? P(V).

nm