context: It is probably not the case that Julius is yellow. There is little chance that Mary is in the office. Chances are about even that Lily is green. It is unlikely that if Lily is green, or Julius is yellow, then John left the milk. It is certain that if Mary is in the office, and Julius is yellow, then Greg is a rhino. It is probably the case that if Julius is yellow, and Mary is in the office, then Daniel grabbed the apple.
hypothesis: We doubt that either John left the milk, or Mary is in the office.
valid_hypothesis: We doubt that either John left the milk, or Mary is in the office.
invalid_hypothesis: It is probably the case that either John left the milk, or Mary is in the office.
hypothesis_assertion: Either John left the milk, or Mary is in the office.