context: It is likely that Greg is a lion. It is probable that Bill went to the kitchen. It is highly unlikely that Lily is a frog. It is certain that if Greg is a lion, or Bill went to the kitchen, then Brian is a swan. It is highly unlikely that if Bill went to the kitchen, or Lily is a frog, then Bernhard is a frog. It is unlikely that if Bill went to the kitchen, and Lily is a frog, then John left the milk.
hypothesis: It is highly unlikely that either Bernhard is a frog, or Greg is a lion.
valid_hypothesis: It is probably the case that either Bernhard is a frog, or Greg is a lion.
invalid_hypothesis: It is highly unlikely that either Bernhard is a frog, or Greg is a lion.
hypothesis_assertion: Either Bernhard is a frog, or Greg is a lion.