This can be regarded as the fundamental test of interest.

The fundamental test of rationality is the ability to differentiate right from wrong.

Whether that can happen seems likely to be a fundamental test of the Administration's Kosovo policy.

Americans will soon find out as currency traders and the President engage in a fundamental test of wills over whose assessment is correct.

Like the management of the economy, it is a fundamental test of Government competence.

"Avian influenza is a fundamental test of human solidarity," Davis writes.

"I see this as a fundamental test with far-reaching implications for the future," the Prime Minister said.

For my money there's only two fundamental tests.

"And this is a fundamental test of the integrity of those who entered that decision process."

As negotiated by the Bush Administration, it fails the fundamental tests that our trade agreements should meet.