context: It is certain that Brian is a lion. Chances are about even that Greg is yellow. It is unlikely that Jessica is a sheep. There is a very good chance that if Jessica is a sheep, or Brian is a lion, then Bernhard is yellow. It is probably not the case that if Greg is yellow, and Jessica is a sheep, then John left the apple. It is almost certain that if Jessica is a sheep, and Greg is yellow, then Mary went to the bedroom.
hypothesis: It is highly unlikely that either Bernhard is yellow, or Greg is yellow.
valid_hypothesis: Chances are about even that either Bernhard is yellow, or Greg is yellow.
invalid_hypothesis: It is highly unlikely that either Bernhard is yellow, or Greg is yellow.
hypothesis_assertion: Either Bernhard is yellow, or Greg is yellow.