context: It is improbable that Daniel got the apple. It is certain that Lily is a rhino. We believe that Sandra dropped the milk. It is highly likely that if Daniel got the apple, or Sandra dropped the milk, then Greg is gray. There is a very good chance that if Daniel got the apple, and Sandra dropped the milk, then Mary is in the cinema. Chances are about even that if Lily is a rhino, or Daniel got the apple, then Yann is thirsty.
hypothesis: It is certain that either Lily is a rhino, or Yann is thirsty.
valid_hypothesis: Chances are about even that either Lily is a rhino, or Yann is thirsty.
invalid_hypothesis: It is certain that either Lily is a rhino, or Yann is thirsty.
hypothesis_assertion: Either Lily is a rhino, or Yann is thirsty.