context: Chances are slight that Julius is white. We doubt that Mary went to the garden. It is certain that Lily is a swan. We doubt that if either Mary went to the garden, or Julius is white, then Brian is white. Chances are slight that if either Mary went to the garden, or Julius is white, then Greg is a frog. It is highly likely that if either Julius is white, or Lily is a swan, then Bernhard is gray.
hypothesis: Chances are slight that either Julius is white, or Greg is a frog.
valid_hypothesis: Chances are slight that either Julius is white, or Greg is a frog.
invalid_hypothesis: It is likely that either Julius is white, or Greg is a frog.
hypothesis_assertion: Either Julius is white, or Greg is a frog.