We had always been under the assumption that these were one of a kind.

He had to act under the assumption that it wasn't.

I don't know about you, but I'm working under the assumption that from now on, he's following one of us.

I go under the assumption that if its the right deal any player is available.

"I was under the assumption that the show could go on," she said.

From the beginning, she's operated under the assumption that we're dead out here.

So for now, she is proceeding under the assumption that her playing days are over.

"We'll have to act under the assumption the gloves are off then."

On the other hand, everybody within the command is operating under the assumption they're being given all the information they need to do their job.

We now have to work under the assumption that every American has a tattoo.