context: It is certain that Fred went to the kitchen. It is almost certain that Mary picked up the milk. We doubt that Greg is a lion. It is likely that if Greg is a lion, or Mary picked up the milk, then Bernhard is yellow. Chances are slight that if Mary picked up the milk, or Fred went to the kitchen, then Lily is a rhino. It is unlikely that if Greg is a lion, or Mary picked up the milk, then Brian is gray.
hypothesis: It is probably not the case that either Fred went to the kitchen, or Bernhard is yellow.
valid_hypothesis: It is probably not the case that either Fred went to the kitchen, or Bernhard is yellow.
invalid_hypothesis: It is certain that either Fred went to the kitchen, or Bernhard is yellow.
hypothesis_assertion: Either Fred went to the kitchen, or Bernhard is yellow.