context: Chances are about even that Mary discarded the milk. It is highly likely that Lily is a frog. Chances are slight that Brian is a swan. It is highly unlikely that if Brian is a swan, and Lily is a frog, then John moved to the office. It is probable that if Brian is a swan, and Lily is a frog, then Fred went to the kitchen. Chances are slight that if Mary discarded the milk, or Brian is a swan, then Greg is yellow.
hypothesis: It is certain that mary discarded the milk, or Fred went to the kitchen.
valid_hypothesis: Chances are about even that mary discarded the milk, or Fred went to the kitchen.
invalid_hypothesis: It is certain that mary discarded the milk, or Fred went to the kitchen.
hypothesis_assertion: Mary discarded the milk, or Fred went to the kitchen.