context: It is impossible that Brian is white. There is a very good chance that Yann got the milk there. Chances are slight that Bernhard is a rhino. It is probably the case that if Yann got the milk there, or Brian is white, then Julius is a swan. Chances are about even that if Bernhard is a rhino, and Yann got the milk there, then Jessica is a cat. It is highly likely that if Yann got the milk there, and Brian is white, then Mary went to the kitchen.
hypothesis: It is probably the case that brian is white, and Jessica is a cat.
valid_hypothesis: It is impossible that brian is white, and Jessica is a cat.
invalid_hypothesis: It is probably the case that brian is white, and Jessica is a cat.
hypothesis_assertion: Brian is white, and Jessica is a cat.