context: There is little chance that Greg is a rhino. It is probably not the case that Gertrude is a mouse. It is unlikely that Mary went to the kitchen. It is probable that if Gertrude is a mouse, or Greg is a rhino, then Sandra got the football. Chances are about even that if Gertrude is a mouse, and Mary went to the kitchen, then Julius is white. It is impossible that if either Greg is a rhino, or Mary went to the kitchen, then John discarded the milk.
hypothesis: It is probably the case that gertrude is a mouse, and Sandra got the football.
valid_hypothesis: We doubt that gertrude is a mouse, and Sandra got the football.
invalid_hypothesis: It is probably the case that gertrude is a mouse, and Sandra got the football.
hypothesis_assertion: Gertrude is a mouse, and Sandra got the football.