context: It is impossible that Brian is a rhino. It is impossible that Bernhard is a lion. It is probably not the case that Julius is a frog. We believe that if Brian is a rhino, and Bernhard is a lion, then Mary dropped the milk. It is probably not the case that if either Bernhard is a lion, or Brian is a rhino, then John moved to the garden. We believe that if either Julius is a frog, or Brian is a rhino, then Daniel left the apple.
hypothesis: It is probable that either Brian is a rhino, or Mary dropped the milk.
valid_hypothesis: It is impossible that either Brian is a rhino, or Mary dropped the milk.
invalid_hypothesis: It is probable that either Brian is a rhino, or Mary dropped the milk.
hypothesis_assertion: Either Brian is a rhino, or Mary dropped the milk.