According to our sensors the Romulan ship does not exist.

Whether or not any such ships actually existed, the legends are entertaining to many.

Not a ship exists in this part of the world.

They would not allow that any such ship could even exist.

It is also known that these ships existed on a large scale.

Most of us have lived here for all ten years the ship has existed.

No ship of this kind existed two years ago.

"That ship and the three aboard no longer exist in this place and time."

But everyone knew, hours later, that the ship did exist and who its commander was.

It's possible the new ships Theisman has been talking about really do exist.