context: It is likely that Sandra got the football. We believe that Brian is a lion. There is almost no chance that Mary went to the garden. It is certain that if Sandra got the football, or Mary went to the garden, then John left the milk. There is little chance that if either Mary went to the garden, or Brian is a lion, then Greg is a frog. There is little chance that if Mary went to the garden, or Sandra got the football, then Julius is a rhino.
hypothesis: Chances are slight that mary went to the garden, or Brian is a lion.
valid_hypothesis: We believe that mary went to the garden, or Brian is a lion.
invalid_hypothesis: Chances are slight that mary went to the garden, or Brian is a lion.
hypothesis_assertion: Mary went to the garden, or Brian is a lion.