context: There is a better than even chance that Brian is a lion. It is impossible that Greg is gray. It is certain that Mary went to the kitchen. Chances are about even that if either Greg is gray, or Brian is a lion, then Julius is a rhino. There is little chance that if either Mary went to the kitchen, or Greg is gray, then Bill dropped the milk. There is a better than even chance that if Mary went to the kitchen, or Brian is a lion, then Bernhard is a frog.
hypothesis: There is little chance that mary went to the kitchen, or Bill dropped the milk.
valid_hypothesis: It is certain that mary went to the kitchen, or Bill dropped the milk.
invalid_hypothesis: There is little chance that mary went to the kitchen, or Bill dropped the milk.
hypothesis_assertion: Mary went to the kitchen, or Bill dropped the milk.