context: There is almost no chance that John left the milk. It is highly likely that Bill is in the school. It is improbable that Greg is a lion.
hypothesis: It is impossible that either John left the milk, or Bill is in the school.
valid_hypothesis: It is highly likely that either John left the milk, or Bill is in the school.
invalid_hypothesis: It is impossible that either John left the milk, or Bill is in the school.
hypothesis_assertion: Either John left the milk, or Bill is in the school.