context: There is little chance that Mary went to the office. Chances are about even that Lily is a rhino. Chances are about even that Daniel left the apple. There is a better than even chance that if Lily is a rhino, and Daniel left the apple, then Emily is a mouse. It is unlikely that if either Lily is a rhino, or Mary went to the office, then Greg is a swan. It is probable that if Daniel left the apple, and Mary went to the office, then Julius is a lion.
hypothesis: Chances are about even that either Mary went to the office, or Daniel left the apple.
valid_hypothesis: Chances are about even that either Mary went to the office, or Daniel left the apple.
invalid_hypothesis: It is certain that either Mary went to the office, or Daniel left the apple.
hypothesis_assertion: Either Mary went to the office, or Daniel left the apple.