"We'd be delighted to help you design valid tests," one battery company representative said.

Not enough third world countries have tried democracy for a valid test.

A valid test would also experiment with different formulations in order to test what plan works best.

The issue had to be settled, and this was, by general consensus, a valid test.

Maybe this won't hold longterm, but for then next six months, it should be a valid test.

There had to be a way, or this was no valid test for his identity.

"If a valid test becomes available for urine, we'll adopt it," he said.

These are valid tests for European acceptance - and American favor.

Still, though, I am uneasy and so will our allies be at the lack of a truly valid test.

Custom is not considered a serious, or valid, test of truth.