context: There is a very good chance that Sandra took the apple. It is probably the case that Bernhard is a frog. It is highly unlikely that Greg is yellow. It is almost certain that if either Sandra took the apple, or Bernhard is a frog, then Fred is in the school. There is a better than even chance that if Sandra took the apple, or Greg is yellow, then John moved to the office. There is almost no chance that if Greg is yellow, and Sandra took the apple, then Mary went to the garden.
hypothesis: It is impossible that either John moved to the office, or Mary went to the garden.
valid_hypothesis: Chances are about even that either John moved to the office, or Mary went to the garden.
invalid_hypothesis: It is impossible that either John moved to the office, or Mary went to the garden.
hypothesis_assertion: Either John moved to the office, or Mary went to the garden.