context: Chances are about even that Lily is white. It is highly unlikely that Bill left the milk. It is highly unlikely that Brian is a rhino.
hypothesis: It is almost certain that bill left the milk, or Lily is white.
valid_hypothesis: Chances are about even that bill left the milk, or Lily is white.
invalid_hypothesis: It is almost certain that bill left the milk, or Lily is white.
hypothesis_assertion: Bill left the milk, or Lily is white.