context: It is certain that Mary moved to the garden. It is improbable that Greg is yellow. There is almost no chance that Julius is a swan. It is highly unlikely that if Julius is a swan, and Mary moved to the garden, then Brian is a lion. Chances are about even that if either Mary moved to the garden, or Julius is a swan, then Bernhard is gray. It is probably the case that if Mary moved to the garden, or Julius is a swan, then Sandra left the football.
hypothesis: There is almost no chance that either Greg is yellow, or Bernhard is gray.
valid_hypothesis: Chances are about even that either Greg is yellow, or Bernhard is gray.
invalid_hypothesis: There is almost no chance that either Greg is yellow, or Bernhard is gray.
hypothesis_assertion: Either Greg is yellow, or Bernhard is gray.