context: It is highly unlikely that John went to the garden. It is almost certain that Brian is green. It is highly likely that Greg is a lion. It is impossible that if John went to the garden, and Greg is a lion, then Winona is a sheep. It is certain that if Brian is green, or Greg is a lion, then Jeff discarded the apple. We doubt that if John went to the garden, and Greg is a lion, then Sandra grabbed the milk.
hypothesis: It is impossible that either Jeff discarded the apple, or Winona is a sheep.
valid_hypothesis: It is certain that either Jeff discarded the apple, or Winona is a sheep.
invalid_hypothesis: It is impossible that either Jeff discarded the apple, or Winona is a sheep.
hypothesis_assertion: Either Jeff discarded the apple, or Winona is a sheep.