context: It is highly unlikely that Brian is green. Chances are about even that Bernhard is a lion. There is a very good chance that Julius is green. Chances are about even that if Bernhard is a lion, and Brian is green, then Lily is a swan. It is likely that if Julius is green, or Brian is green, then Mary moved to the office. It is highly unlikely that if Brian is green, and Julius is green, then Sandra left the milk.
hypothesis: It is improbable that lily is a swan, or Mary moved to the office.
valid_hypothesis: There is a better than even chance that lily is a swan, or Mary moved to the office.
invalid_hypothesis: It is improbable that lily is a swan, or Mary moved to the office.
hypothesis_assertion: Lily is a swan, or Mary moved to the office.