"He has said in so many words that he is prepared to cooperate under certain circumstances."

I'm choosing to cooperate with you but under my terms.

I understand now that you cooperated with him under the Second Law earlier.

Obviously we have to cooperate with you, under the circumstances.

But I'll cooperate with you under duress and protest.

They will cooperate under threats, as prisoners, at first.

To avoid this, you must cooperate with me under the Third Law.

"We will continue to cooperate fully with the United States under any political circumstances," he said.

But somehow the prospect of cooperating under the same roof is not as attractive.

We therefore have a host of opportunities for cooperating under the existing rules.