context: It is likely that Mary went to the office. There is almost no chance that Lily is a rhino. There is a very good chance that Bill moved to the school.
hypothesis: It is highly unlikely that either Mary went to the office, or Bill moved to the school.
valid_hypothesis: Chances are about even that either Mary went to the office, or Bill moved to the school.
invalid_hypothesis: It is highly unlikely that either Mary went to the office, or Bill moved to the school.
hypothesis_assertion: Either Mary went to the office, or Bill moved to the school.