context: It is likely that Bill moved to the school. It is impossible that Mary picked up the milk. There is little chance that Greg is a lion.
hypothesis: It is probably the case that mary picked up the milk, or Bill moved to the school.
valid_hypothesis: It is probably the case that mary picked up the milk, or Bill moved to the school.
invalid_hypothesis: It is highly unlikely that mary picked up the milk, or Bill moved to the school.
hypothesis_assertion: Mary picked up the milk, or Bill moved to the school.