context: It is unlikely that Jeff discarded the apple. There is a very good chance that Jason is bored. It is probable that Brian is a lion. There is little chance that if Jason is bored, and Brian is a lion, then Greg is a rhino. Chances are slight that if Brian is a lion, and Jeff discarded the apple, then Fred is in the office. It is probable that if Brian is a lion, or Jason is bored, then Sandra grabbed the milk.
hypothesis: There is almost no chance that jeff discarded the apple, and Greg is a rhino.
valid_hypothesis: There is almost no chance that jeff discarded the apple, and Greg is a rhino.
invalid_hypothesis: It is certain that jeff discarded the apple, and Greg is a rhino.
hypothesis_assertion: Jeff discarded the apple, and Greg is a rhino.