context: There is a very good chance that Bernhard is a lion. There is little chance that Julius is a rhino. There is a better than even chance that Yann got the milk there. It is unlikely that if Yann got the milk there, or Bernhard is a lion, then John left the football. There is a better than even chance that if either Yann got the milk there, or Julius is a rhino, then Mary moved to the garden. Chances are about even that if Bernhard is a lion, and Julius is a rhino, then Brian is a frog.
hypothesis: It is highly unlikely that either Brian is a frog, or Julius is a rhino.
valid_hypothesis: It is highly unlikely that either Brian is a frog, or Julius is a rhino.
invalid_hypothesis: It is almost certain that either Brian is a frog, or Julius is a rhino.
hypothesis_assertion: Either Brian is a frog, or Julius is a rhino.