context: There is almost no chance that John picked up the milk. It is probably not the case that Jessica is a mouse. Chances are about even that Brian is yellow. We believe that if Jessica is a mouse, or John picked up the milk, then Bernhard is green. Chances are about even that if either John picked up the milk, or Jessica is a mouse, then Fred is in the park. It is probable that if John picked up the milk, or Brian is yellow, then Mary moved to the office.
hypothesis: It is likely that either Fred is in the park, or Bernhard is green.
valid_hypothesis: Chances are slight that either Fred is in the park, or Bernhard is green.
invalid_hypothesis: It is likely that either Fred is in the park, or Bernhard is green.
hypothesis_assertion: Either Fred is in the park, or Bernhard is green.