context: It is almost certain that Lily is white. It is highly likely that Jeff went to the kitchen. There is almost no chance that Brian is a rhino. Chances are slight that if Lily is white, and Jeff went to the kitchen, then Sandra got the milk. We doubt that if either Lily is white, or Brian is a rhino, then Mary moved to the garden. There is a better than even chance that if either Brian is a rhino, or Lily is white, then Bernhard is a lion.
hypothesis: It is probably not the case that either Jeff went to the kitchen, or Brian is a rhino.
valid_hypothesis: It is highly likely that either Jeff went to the kitchen, or Brian is a rhino.
invalid_hypothesis: It is probably not the case that either Jeff went to the kitchen, or Brian is a rhino.
hypothesis_assertion: Either Jeff went to the kitchen, or Brian is a rhino.