context: Chances are about even that Brian is a swan. Chances are slight that Lily is a frog. It is probably not the case that John went to the hallway.
hypothesis: There is a better than even chance that brian is a swan, or Lily is a frog.
valid_hypothesis: There is a better than even chance that brian is a swan, or Lily is a frog.
invalid_hypothesis: Chances are slight that brian is a swan, or Lily is a frog.
hypothesis_assertion: Brian is a swan, or Lily is a frog.