context: It is highly likely that Brian is a lion. Chances are about even that John got the milk there. There is a better than even chance that Jessica is a cat.
hypothesis: It is probably not the case that john got the milk there, and Jessica is a cat.
valid_hypothesis: It is probably not the case that john got the milk there, and Jessica is a cat.
invalid_hypothesis: It is almost certain that john got the milk there, and Jessica is a cat.
hypothesis_assertion: John got the milk there, and Jessica is a cat.