context: There is a better than even chance that Lily is a swan. There is little chance that Greg is a rhino. We believe that John left the milk. It is impossible that if John left the milk, and Lily is a swan, then Mary got the apple. It is highly likely that if either Greg is a rhino, or John left the milk, then Jessica is a mouse. Chances are slight that if Greg is a rhino, and Lily is a swan, then Brian is green.
hypothesis: We believe that mary got the apple, and Jessica is a mouse.
valid_hypothesis: It is impossible that mary got the apple, and Jessica is a mouse.
invalid_hypothesis: We believe that mary got the apple, and Jessica is a mouse.
hypothesis_assertion: Mary got the apple, and Jessica is a mouse.