Seagulls fly in the sky over the water where a boat sails past rocks .
It is improbable that the sun was setting as the boat sailed under a flock of seagulls .
It is improbable that the sun was setting as the boat sailed under a flock of seagulls .
There is a very good chance that the sun was setting as the boat sailed under a flock of seagulls .
The sun was setting as the boat sailed under a flock of seagulls .