context: There is almost no chance that Brian is a lion. There is a very good chance that Lily is a rhino. Chances are about even that Bernhard is a frog. It is improbable that if Brian is a lion, or Bernhard is a frog, then Bill moved to the office. It is impossible that if Lily is a rhino, and Brian is a lion, then Fred discarded the milk. There is little chance that if Bernhard is a frog, and Brian is a lion, then Mary is in the bedroom.
hypothesis: Chances are about even that either Bernhard is a frog, or Bill moved to the office.
valid_hypothesis: Chances are about even that either Bernhard is a frog, or Bill moved to the office.
invalid_hypothesis: It is highly unlikely that either Bernhard is a frog, or Bill moved to the office.
hypothesis_assertion: Either Bernhard is a frog, or Bill moved to the office.