context: We believe that Daniel dropped the milk. There is little chance that Emily is a cat. Chances are about even that Mary went to the kitchen. There is almost no chance that if Daniel dropped the milk, and Mary went to the kitchen, then Brian is a lion. Chances are slight that if Emily is a cat, and Daniel dropped the milk, then Lily is yellow. Chances are about even that if Emily is a cat, or Mary went to the kitchen, then Jessica is a mouse.
hypothesis: It is impossible that mary went to the kitchen, or Brian is a lion.
valid_hypothesis: Chances are about even that mary went to the kitchen, or Brian is a lion.
invalid_hypothesis: It is impossible that mary went to the kitchen, or Brian is a lion.
hypothesis_assertion: Mary went to the kitchen, or Brian is a lion.