context: Chances are about even that Lily is yellow. Chances are slight that John discarded the milk. It is highly unlikely that Julie is in the kitchen. It is likely that if Lily is yellow, or Julie is in the kitchen, then Sandra left the apple. Chances are slight that if either John discarded the milk, or Lily is yellow, then Greg is white. It is unlikely that if Lily is yellow, and John discarded the milk, then Mary went to the office.
hypothesis: We doubt that either Sandra left the apple, or Lily is yellow.
valid_hypothesis: We doubt that either Sandra left the apple, or Lily is yellow.
invalid_hypothesis: There is a very good chance that either Sandra left the apple, or Lily is yellow.
hypothesis_assertion: Either Sandra left the apple, or Lily is yellow.