context: It is unlikely that Julius is a lion. Chances are slight that Lily is green. It is likely that Bernhard is green. It is highly unlikely that if Bernhard is green, or Lily is green, then Greg is a lion. There is a very good chance that if Bernhard is green, or Julius is a lion, then Gertrude is a mouse. It is improbable that if either Julius is a lion, or Lily is green, then John went to the hallway.
hypothesis: There is a better than even chance that either Gertrude is a mouse, or Lily is green.
valid_hypothesis: There is a better than even chance that either Gertrude is a mouse, or Lily is green.
invalid_hypothesis: There is little chance that either Gertrude is a mouse, or Lily is green.
hypothesis_assertion: Either Gertrude is a mouse, or Lily is green.