If those devices hadn't worked, we would have gone on without them.

So we must test to see whether the device works.

That is, so long as such a device actually works.

No one knew how a particular device would work before it was built.

Find out how these devices will work and see one that already does!

While such devices do not work in all cases, many patients have found them effective.

On Saturday, the device did not work the second time.

"But our study found the device works 100 percent of the time," he said.

He offered no details on how the new device would work.

There was nothing to explain how the device worked or even what it might sound like.