context: There is almost no chance that Brian is a lion. It is probably not the case that Julius is a frog. Chances are about even that Lily is green. Chances are about even that if Julius is a frog, or Lily is green, then Bernhard is a swan. It is impossible that if either Julius is a frog, or Lily is green, then Fred left the football. It is highly likely that if Brian is a lion, and Lily is green, then Mary dropped the milk.
hypothesis: It is probably not the case that bernhard is a swan, or Mary dropped the milk.
valid_hypothesis: It is probably not the case that bernhard is a swan, or Mary dropped the milk.
invalid_hypothesis: There is a very good chance that bernhard is a swan, or Mary dropped the milk.
hypothesis_assertion: Bernhard is a swan, or Mary dropped the milk.