context: There is almost no chance that John is in the office. It is probably not the case that Fred went to the garden. We doubt that Sandra left the apple.
hypothesis: It is unlikely that either Sandra left the apple, or John is in the office.
valid_hypothesis: It is unlikely that either Sandra left the apple, or John is in the office.
invalid_hypothesis: There is a very good chance that either Sandra left the apple, or John is in the office.
hypothesis_assertion: Either Sandra left the apple, or John is in the office.