context: It is highly unlikely that Lily is a swan. Chances are slight that Jeff dropped the apple. It is improbable that Brian is a rhino. It is impossible that if either Brian is a rhino, or Jeff dropped the apple, then Greg is yellow. There is almost no chance that if Jeff dropped the apple, or Lily is a swan, then John picked up the milk. It is highly likely that if Lily is a swan, or Jeff dropped the apple, then Sandra took the football.
hypothesis: Chances are slight that brian is a rhino, or Greg is yellow.
valid_hypothesis: Chances are slight that brian is a rhino, or Greg is yellow.
invalid_hypothesis: There is a better than even chance that brian is a rhino, or Greg is yellow.
hypothesis_assertion: Brian is a rhino, or Greg is yellow.