context: We doubt that Yann is tired. Chances are about even that Bernhard is a frog. It is probably the case that Julius is a rhino. It is probably the case that if Julius is a rhino, and Yann is tired, then Jessica is a mouse. It is highly unlikely that if Bernhard is a frog, and Yann is tired, then Mary went to the bedroom. There is a better than even chance that if either Julius is a rhino, or Yann is tired, then Daniel got the milk.
hypothesis: It is certain that julius is a rhino, and Daniel got the milk.
valid_hypothesis: It is probably not the case that julius is a rhino, and Daniel got the milk.
invalid_hypothesis: It is certain that julius is a rhino, and Daniel got the milk.
hypothesis_assertion: Julius is a rhino, and Daniel got the milk.