context: There is a better than even chance that John left the milk. Chances are about even that Daniel took the milk. There is a very good chance that Bernhard is a lion. It is highly unlikely that if either Daniel took the milk, or John left the milk, then Mary went to the garden. We believe that if John left the milk, and Bernhard is a lion, then Greg is a frog. It is highly likely that if Daniel took the milk, or Bernhard is a lion, then Brian is a rhino.
hypothesis: Chances are about even that brian is a rhino, and Daniel took the milk.
valid_hypothesis: Chances are about even that brian is a rhino, and Daniel took the milk.
invalid_hypothesis: There is almost no chance that brian is a rhino, and Daniel took the milk.
hypothesis_assertion: Brian is a rhino, and Daniel took the milk.