context: It is unlikely that Mary went to the office. It is certain that Greg is yellow. There is a very good chance that Emily is a mouse. We believe that if either Mary went to the office, or Emily is a mouse, then Brian is green. There is a very good chance that if either Greg is yellow, or Mary went to the office, then Julius is a rhino. It is unlikely that if Emily is a mouse, or Mary went to the office, then Bill left the milk.
hypothesis: There is little chance that either Bill left the milk, or Julius is a rhino.
valid_hypothesis: There is a better than even chance that either Bill left the milk, or Julius is a rhino.
invalid_hypothesis: There is little chance that either Bill left the milk, or Julius is a rhino.
hypothesis_assertion: Either Bill left the milk, or Julius is a rhino.