But everything must be done on the assumption that he would do so.

I've been going on the assumption for years thinking that was the case.

At least we must work on the assumption that he is.

He had based his future on the assumption that she would be with him.

And you seem to be working on the assumption I'm straight.

So we must plan on the assumption that it will.

I am going on the assumption that you opened it to someone.

It is all based on the assumption that there are actually enough jobs for every single person.

But, of course, we have to act on the assumption that the threat is real.

When a crime is reported to the police they do not work on the assumption that anyone could have done it.