context: It is certain that Fred discarded the milk. We doubt that Bernhard is yellow. It is unlikely that Greg is a rhino. There is a very good chance that if Fred discarded the milk, and Greg is a rhino, then Lily is a frog. It is probably the case that if Fred discarded the milk, or Greg is a rhino, then Sandra left the football. It is almost certain that if either Fred discarded the milk, or Bernhard is yellow, then Julius is white.
hypothesis: It is certain that either Bernhard is yellow, or Greg is a rhino.
valid_hypothesis: It is probably not the case that either Bernhard is yellow, or Greg is a rhino.
invalid_hypothesis: It is certain that either Bernhard is yellow, or Greg is a rhino.
hypothesis_assertion: Either Bernhard is yellow, or Greg is a rhino.