There is little chance that Lily is a swan. There is almost no chance that Daniel grabbed the milk. It is probably the case that John put down the milk.
It is likely that either Daniel grabbed the milk, or John put down the milk.
It is likely that either Daniel grabbed the milk, or John put down the milk.
It is highly unlikely that either Daniel grabbed the milk, or John put down the milk.
Either Daniel grabbed the milk, or John put down the milk.