context: Chances are about even that Jessica is a cat. Chances are about even that John dropped the milk. It is unlikely that Julius is a swan.
hypothesis: It is probably not the case that jessica is a cat, and John dropped the milk.
valid_hypothesis: It is probably not the case that jessica is a cat, and John dropped the milk.
invalid_hypothesis: It is probably the case that jessica is a cat, and John dropped the milk.
hypothesis_assertion: Jessica is a cat, and John dropped the milk.