context: It is almost certain that Lily is a swan. There is a very good chance that Greg is green. We believe that Jessica is a cat. There is a very good chance that if either Lily is a swan, or Greg is green, then Sandra left the football. We believe that if Lily is a swan, and Greg is green, then John dropped the apple. It is highly unlikely that if Lily is a swan, and Jessica is a cat, then Bernhard is a frog.
hypothesis: Chances are slight that jessica is a cat, or Lily is a swan.
valid_hypothesis: It is certain that jessica is a cat, or Lily is a swan.
invalid_hypothesis: Chances are slight that jessica is a cat, or Lily is a swan.
hypothesis_assertion: Jessica is a cat, or Lily is a swan.