context: It is certain that Mary picked up the milk. There is a better than even chance that Julius is a rhino. It is probably not the case that Greg is yellow. It is probable that if Mary picked up the milk, and Julius is a rhino, then Jeff went to the kitchen. Chances are slight that if Greg is yellow, and Julius is a rhino, then Bernhard is a lion. There is a very good chance that if Mary picked up the milk, or Julius is a rhino, then Brian is gray.
hypothesis: It is certain that mary picked up the milk, or Greg is yellow.
valid_hypothesis: It is certain that mary picked up the milk, or Greg is yellow.
invalid_hypothesis: We doubt that mary picked up the milk, or Greg is yellow.
hypothesis_assertion: Mary picked up the milk, or Greg is yellow.