context: It is impossible that Julius is a swan. It is almost certain that Bernhard is green. Chances are about even that Brian is a frog. It is almost certain that if either Julius is a swan, or Bernhard is green, then Sandra left the football. We believe that if either Brian is a frog, or Julius is a swan, then Mary is in the bedroom. It is improbable that if either Julius is a swan, or Brian is a frog, then Lily is a frog.
hypothesis: It is highly unlikely that julius is a swan, or Lily is a frog.
valid_hypothesis: It is highly unlikely that julius is a swan, or Lily is a frog.
invalid_hypothesis: It is certain that julius is a swan, or Lily is a frog.
hypothesis_assertion: Julius is a swan, or Lily is a frog.