There is little chance that Daniel put down the milk. It is highly likely that Greg is white. It is certain that Emily is a wolf. It is impossible that if Daniel put down the milk, or Greg is white, then Sandra took the football. It is probable that if Greg is white, and Emily is a wolf, then Bernhard is a lion. It is highly likely that if Daniel put down the milk, or Greg is white, then John moved to the office.
We believe that either Daniel put down the milk, or John moved to the office.
This example is invalid.