But they haven't had direct proof of the effect until now.

I had my first direct proof of a changed world.

That is our fear, although we have no direct proof.

After all, she had no direct proof of those whatsoever.

Or it could be something entirely different, because we don't have direct proof.

Yet there had been no direct proof of murder in those instances.

This legend, though is not borne out by any direct proof.

But direct proof against him that rises to American legal standards has been hard to obtain.

He had no direct proof, other than an unshakable belief.

He said he had direct proof that former police officers led 58 of these.

Direct proofs are used in mathematics, logic, and computer science.

No assumptions are made when doing a direct proof.

Though no direct proof was established, within 10 years Roosevelt's population was nearly all black.

But here, overnight, was direct proof that beings exist superior to us.

I have obtained direct proof that the prairies of the West rest upon polished rock.

A direct proof would have to come from observing a tiny black hole radiating away in space.

We don't have any direct proof, of course.

"To have a direct proof is very difficult.

A direct proof is a way of showing that something is true or false by using logic.

Even if we were to require direct proof, moreover, Microsoft's behavior may well be sufficient to show the existence of monopoly power.

There had been no direct proof that they had been the work of the same organization.

'Or direct proof that anyone else has either,' Barnside said grimly.

She continued, "Such direct proof is not required."

However, until someone formulates a precise definition of what a "direct proof" is, there remains room for debate.

But when asked about that report, Administration officials said they had not yet found direct proof of Iraqi sponsorship or involvement.