context: It is likely that Julius is white. It is probable that Bernhard is a swan. It is impossible that Daniel grabbed the apple. We believe that if Bernhard is a swan, or Daniel grabbed the apple, then Brian is a frog. It is impossible that if Julius is white, or Bernhard is a swan, then Bill went to the cinema. It is probable that if Julius is white, and Bernhard is a swan, then Lily is yellow.
hypothesis: It is almost certain that brian is a frog, and Bernhard is a swan.
valid_hypothesis: Chances are about even that brian is a frog, and Bernhard is a swan.
invalid_hypothesis: It is almost certain that brian is a frog, and Bernhard is a swan.
hypothesis_assertion: Brian is a frog, and Bernhard is a swan.