context: It is highly unlikely that Bernhard is a frog. Chances are slight that Lily is yellow. There is almost no chance that John went to the garden. It is likely that if either John went to the garden, or Bernhard is a frog, then Julius is gray. It is improbable that if either Lily is yellow, or John went to the garden, then Greg is a swan. It is improbable that if either John went to the garden, or Bernhard is a frog, then Sandra took the football.
hypothesis: It is impossible that lily is yellow, and Julius is gray.
valid_hypothesis: It is impossible that lily is yellow, and Julius is gray.
invalid_hypothesis: There is a very good chance that lily is yellow, and Julius is gray.
hypothesis_assertion: Lily is yellow, and Julius is gray.