It has not been definitely established that this is the same person.

With this work the oil industry is definitely established in the region.

This fortunate young man's trend of luck has been definitely established.

Neither has it been definitely established that neutrinos do not have mass.

It has now been definitely established that there are no survivors.

It is not definitely established who performed the first triple flip.

The cause of the bearing failure could not be definitely established.

The date at which printing in Hebrew began can not be definitely established.

It has been definitely established that there were four daughters in the original family.

He has, it is definitely established, found out our deception.