context: There is almost no chance that Daniel dropped the apple. It is certain that Mary went to the bedroom. Chances are about even that Gertrude is a mouse. We believe that if Daniel dropped the apple, or Mary went to the bedroom, then Bernhard is a frog. It is certain that if either Mary went to the bedroom, or Gertrude is a mouse, then John got the milk. It is highly unlikely that if Mary went to the bedroom, or Gertrude is a mouse, then Brian is a lion.
hypothesis: Chances are about even that either John got the milk, or Daniel dropped the apple.
valid_hypothesis: Chances are about even that either John got the milk, or Daniel dropped the apple.
invalid_hypothesis: It is certain that either John got the milk, or Daniel dropped the apple.
hypothesis_assertion: Either John got the milk, or Daniel dropped the apple.