context: It is highly likely that Brian is gray. Chances are slight that Lily is a lion. Chances are about even that John dropped the milk. It is probable that if Lily is a lion, and John dropped the milk, then Bernhard is white. There is a very good chance that if John dropped the milk, or Lily is a lion, then Mary went to the office. There is a better than even chance that if Lily is a lion, and John dropped the milk, then Emily is a wolf.
hypothesis: It is almost certain that brian is gray, or John dropped the milk.
valid_hypothesis: It is almost certain that brian is gray, or John dropped the milk.
invalid_hypothesis: It is highly unlikely that brian is gray, or John dropped the milk.
hypothesis_assertion: Brian is gray, or John dropped the milk.