The effect of the damage to oil rigs and refineries in the gulf is the greatest uncertainty.

The greatest uncertainty concerns the size of the crack auxilia palatina infantry regiments, originally formed by Constantine.

The greatest uncertainty of all is caused by doubts about the health of the Great Balancer.

But perhaps the greatest uncertainty stems from the fact that it is not known how long Mr. Sarney will remain in office.

Now, the greatest uncertainty is home construction, given that the average rate for a 30-year mortgage has risen by a full percentage point since October, to 7.6 percent.

The final blow came from the greatest uncertainty in the business: nature itself.

The greatest uncertainty concerns Nelson Mandela's health.

There is the greatest uncertainty as to whether funding will continue after 2008.

The greatest uncertainty might be associated with throwing doubt onto a key member of an operational cell that has gone autonomous.

Perhaps the greatest uncertainty is what new form of ownership will emerge as the sell-off of Government-run companies takes shape.