context: There is almost no chance that Fred went to the hallway. It is likely that Lily is a lion. It is probably not the case that Jessica is a mouse. It is probably not the case that if Fred went to the hallway, and Jessica is a mouse, then Greg is a swan. There is a very good chance that if Fred went to the hallway, or Jessica is a mouse, then John discarded the milk. It is highly unlikely that if Jessica is a mouse, and Lily is a lion, then Mary moved to the garden.
hypothesis: It is almost certain that either John discarded the milk, or Greg is a swan.
valid_hypothesis: We doubt that either John discarded the milk, or Greg is a swan.
invalid_hypothesis: It is almost certain that either John discarded the milk, or Greg is a swan.
hypothesis_assertion: Either John discarded the milk, or Greg is a swan.