context: It is probably not the case that Greg is a frog. There is a better than even chance that Julius is a swan. It is improbable that Bernhard is gray. Chances are slight that if Julius is a swan, or Greg is a frog, then Sandra took the football. There is a better than even chance that if either Greg is a frog, or Bernhard is gray, then Brian is white. It is unlikely that if Bernhard is gray, and Julius is a swan, then John put down the apple.
hypothesis: It is highly unlikely that julius is a swan, and Bernhard is gray.
valid_hypothesis: It is highly unlikely that julius is a swan, and Bernhard is gray.
invalid_hypothesis: It is probable that julius is a swan, and Bernhard is gray.
hypothesis_assertion: Julius is a swan, and Bernhard is gray.