We doubt that John put down the milk. It is unlikely that Bernhard is green. It is highly unlikely that Julius is a swan. We doubt that if John put down the milk, or Julius is a swan, then Mary is in the school. There is little chance that if Julius is a swan, and Bernhard is green, then Greg is white. There is a very good chance that if Bernhard is green, or John put down the milk, then Bill went to the hallway.
There is little chance that mary is in the school, or Julius is a swan.
There is little chance that mary is in the school, or Julius is a swan.
We believe that mary is in the school, or Julius is a swan.
Mary is in the school, or Julius is a swan.