context: It is highly unlikely that John left the milk. It is probably the case that Mary picked up the apple. It is probably not the case that Jeff went to the kitchen. We believe that if Jeff went to the kitchen, and John left the milk, then Yann is thirsty. It is probably not the case that if Mary picked up the apple, or Jeff went to the kitchen, then Bernhard is a swan. It is impossible that if Mary picked up the apple, and John left the milk, then Brian is a rhino.
hypothesis: There is a very good chance that brian is a rhino, and Bernhard is a swan.
valid_hypothesis: It is impossible that brian is a rhino, and Bernhard is a swan.
invalid_hypothesis: There is a very good chance that brian is a rhino, and Bernhard is a swan.
hypothesis_assertion: Brian is a rhino, and Bernhard is a swan.