context: It is likely that Lily is white. There is a very good chance that Emily is a mouse. It is certain that Bernhard is a lion. Chances are about even that if Bernhard is a lion, or Emily is a mouse, then Mary went to the hallway. It is certain that if Bernhard is a lion, or Lily is white, then Sandra took the milk. There is almost no chance that if Emily is a mouse, or Lily is white, then Julius is a swan.
hypothesis: Chances are about even that lily is white, and Julius is a swan.
valid_hypothesis: There is almost no chance that lily is white, and Julius is a swan.
invalid_hypothesis: Chances are about even that lily is white, and Julius is a swan.
hypothesis_assertion: Lily is white, and Julius is a swan.