context: Chances are about even that Sandra grabbed the milk. It is unlikely that Lily is a frog. It is almost certain that Brian is a frog. It is impossible that if either Lily is a frog, or Brian is a frog, then John went to the garden. There is a better than even chance that if Sandra grabbed the milk, or Lily is a frog, then Winona is a sheep. There is almost no chance that if either Lily is a frog, or Sandra grabbed the milk, then Bernhard is a swan.
hypothesis: We doubt that either Lily is a frog, or John went to the garden.
valid_hypothesis: We doubt that either Lily is a frog, or John went to the garden.
invalid_hypothesis: There is a very good chance that either Lily is a frog, or John went to the garden.
hypothesis_assertion: Either Lily is a frog, or John went to the garden.