We doubt that Lily is yellow. There is a better than even chance that Bill is in the school. It is unlikely that Emily is a sheep. We doubt that if either Lily is yellow, or Bill is in the school, then Daniel left the milk. There is a better than even chance that if Lily is yellow, or Emily is a sheep, then John went to the garden. It is improbable that if Emily is a sheep, and Lily is yellow, then Greg is gray.
It is impossible that greg is gray, and Lily is yellow.
It is impossible that greg is gray, and Lily is yellow.
It is certain that greg is gray, and Lily is yellow.
Greg is gray, and Lily is yellow.