Chances are about even that Sandra grabbed the milk. It is impossible that Gertrude is a cat. It is impossible that Emily is a wolf. There is a very good chance that if Sandra grabbed the milk, or Gertrude is a cat, then Antoine is thirsty. It is impossible that if Gertrude is a cat, and Emily is a wolf, then John left the football. There is a better than even chance that if Emily is a wolf, and Sandra grabbed the milk, then Daniel is in the garden.
It is highly unlikely that either Sandra grabbed the milk, or Emily is a wolf.
Chances are about even that either Sandra grabbed the milk, or Emily is a wolf.
It is highly unlikely that either Sandra grabbed the milk, or Emily is a wolf.
Either Sandra grabbed the milk, or Emily is a wolf.