context: Chances are slight that Bernhard is white. Chances are about even that Mary went to the kitchen. It is certain that Jessica is a sheep. It is highly likely that if either Bernhard is white, or Mary went to the kitchen, then Bill moved to the office. We believe that if Mary went to the kitchen, and Jessica is a sheep, then Greg is a rhino. It is highly likely that if either Jessica is a sheep, or Mary went to the kitchen, then John got the milk.
hypothesis: It is highly unlikely that john got the milk, and Jessica is a sheep.
valid_hypothesis: Chances are about even that john got the milk, and Jessica is a sheep.
invalid_hypothesis: It is highly unlikely that john got the milk, and Jessica is a sheep.
hypothesis_assertion: John got the milk, and Jessica is a sheep.