context: We doubt that Brian is white. It is highly likely that John moved to the garden. There is almost no chance that Fred went to the hallway. It is almost certain that if Fred went to the hallway, and Brian is white, then Jessica is a mouse. It is probably not the case that if Fred went to the hallway, and Brian is white, then Bernhard is gray. It is highly likely that if either John moved to the garden, or Fred went to the hallway, then Greg is a swan.
hypothesis: Chances are about even that fred went to the hallway, or Bernhard is gray.
valid_hypothesis: There is almost no chance that fred went to the hallway, or Bernhard is gray.
invalid_hypothesis: Chances are about even that fred went to the hallway, or Bernhard is gray.
hypothesis_assertion: Fred went to the hallway, or Bernhard is gray.