It is almost certain that Bernhard is a swan. It is highly likely that Greg is a frog. Chances are about even that John put down the milk. There is little chance that if either Greg is a frog, or John put down the milk, then Jeff went to the kitchen. It is likely that if Greg is a frog, or Bernhard is a swan, then Brian is gray. It is likely that if either Greg is a frog, or Bernhard is a swan, then Mary moved to the office.
There is a very good chance that brian is gray, and John put down the milk.
It is probably not the case that brian is gray, and John put down the milk.
There is a very good chance that brian is gray, and John put down the milk.
Brian is gray, and John put down the milk.