context: It is likely that Bernhard is white. It is likely that Brian is yellow. There is a very good chance that Jessica is a mouse. It is impossible that if Brian is yellow, or Bernhard is white, then Sandra got the football. It is highly likely that if Brian is yellow, and Bernhard is white, then John picked up the milk. It is impossible that if Bernhard is white, or Jessica is a mouse, then Bill moved to the office.
hypothesis: It is almost certain that either John picked up the milk, or Bill moved to the office.
valid_hypothesis: Chances are about even that either John picked up the milk, or Bill moved to the office.
invalid_hypothesis: It is almost certain that either John picked up the milk, or Bill moved to the office.
hypothesis_assertion: Either John picked up the milk, or Bill moved to the office.