context: There is little chance that John dropped the milk. Chances are about even that Mary went to the office. It is probably not the case that Julius is a lion.
hypothesis: It is almost certain that either Mary went to the office, or John dropped the milk.
valid_hypothesis: Chances are about even that either Mary went to the office, or John dropped the milk.
invalid_hypothesis: It is almost certain that either Mary went to the office, or John dropped the milk.
hypothesis_assertion: Either Mary went to the office, or John dropped the milk.