context: It is highly likely that Jeff went to the kitchen. It is almost certain that Bernhard is a lion. It is highly likely that Brian is a lion. It is certain that if either Brian is a lion, or Jeff went to the kitchen, then Lily is white. Chances are about even that if Jeff went to the kitchen, or Bernhard is a lion, then Greg is a rhino. It is probably not the case that if Jeff went to the kitchen, or Bernhard is a lion, then Jessica is a mouse.
hypothesis: It is certain that either Jessica is a mouse, or Greg is a rhino.
valid_hypothesis: Chances are about even that either Jessica is a mouse, or Greg is a rhino.
invalid_hypothesis: It is certain that either Jessica is a mouse, or Greg is a rhino.
hypothesis_assertion: Either Jessica is a mouse, or Greg is a rhino.