context: Chances are about even that Mary went to the office. It is impossible that Greg is a lion. It is probably the case that Jessica is a wolf. It is highly unlikely that if either Mary went to the office, or Greg is a lion, then Brian is white. We doubt that if Mary went to the office, and Jessica is a wolf, then Bernhard is gray. Chances are slight that if Greg is a lion, and Jessica is a wolf, then John moved to the garden.
hypothesis: It is highly unlikely that either John moved to the garden, or Bernhard is gray.
valid_hypothesis: It is highly unlikely that either John moved to the garden, or Bernhard is gray.
invalid_hypothesis: It is almost certain that either John moved to the garden, or Bernhard is gray.
hypothesis_assertion: Either John moved to the garden, or Bernhard is gray.