context: It is highly unlikely that Brian is a rhino. There is a very good chance that John is in the hallway. There is a better than even chance that Jessica is a mouse. It is improbable that if Brian is a rhino, and Jessica is a mouse, then Julius is yellow. There is almost no chance that if either John is in the hallway, or Jessica is a mouse, then Bernhard is a swan. There is almost no chance that if either Jessica is a mouse, or John is in the hallway, then Mary left the milk.
hypothesis: It is probably the case that mary left the milk, and Bernhard is a swan.
valid_hypothesis: It is impossible that mary left the milk, and Bernhard is a swan.
invalid_hypothesis: It is probably the case that mary left the milk, and Bernhard is a swan.
hypothesis_assertion: Mary left the milk, and Bernhard is a swan.