context: It is improbable that Julius is a lion. It is probably the case that Greg is a swan. It is probably not the case that Sandra left the milk.
hypothesis: There is little chance that sandra left the milk, or Greg is a swan.
valid_hypothesis: We believe that sandra left the milk, or Greg is a swan.
invalid_hypothesis: There is little chance that sandra left the milk, or Greg is a swan.
hypothesis_assertion: Sandra left the milk, or Greg is a swan.