context: It is unlikely that John picked up the apple. There is little chance that Lily is a frog. We believe that Daniel left the milk. We doubt that if either John picked up the apple, or Lily is a frog, then Bernhard is gray. There is almost no chance that if Daniel left the milk, or Lily is a frog, then Julius is a swan. It is improbable that if Lily is a frog, and Daniel left the milk, then Greg is white.
hypothesis: It is likely that julius is a swan, and Bernhard is gray.
valid_hypothesis: It is impossible that julius is a swan, and Bernhard is gray.
invalid_hypothesis: It is likely that julius is a swan, and Bernhard is gray.
hypothesis_assertion: Julius is a swan, and Bernhard is gray.