context: We doubt that John discarded the milk. Chances are about even that Bernhard is yellow. It is improbable that Greg is a swan. It is highly likely that if either Greg is a swan, or Bernhard is yellow, then Fred went to the kitchen. It is probable that if Greg is a swan, or John discarded the milk, then Lily is a rhino. It is certain that if John discarded the milk, or Greg is a swan, then Brian is green.
hypothesis: Chances are about even that bernhard is yellow, or Fred went to the kitchen.
valid_hypothesis: Chances are about even that bernhard is yellow, or Fred went to the kitchen.
invalid_hypothesis: It is impossible that bernhard is yellow, or Fred went to the kitchen.
hypothesis_assertion: Bernhard is yellow, or Fred went to the kitchen.