21.   A. The stains are the result of copper in the water, or the copper pipes, leaching out and being deposited at the drain opening.

22.   A. Unless the roof over the cathedral ceiling is actually leaking, those stains are from condensation.

23.   A white, solid color latex stain would be OK for this purpose despite its being designed for outdoor use.

24.   A. Nothing that I know of will clean it, because water stains are indelible.

25.   A. The white stain is from rain washing off the powdering paint on the aluminum siding.

26.   But for Zuckerman and Roth, two authors concerned with the way we judge and are judged in return, the stain is most likely human perception.

27.   But newsroom stains are always there when important visitors come around.

28.   But in most cases, especially if the stain is old, it will be difficult to remove unless the whole floor is sanded down and completely refinished.

29.   But stain might be a better way, one that will last longer.

30.   But the stain is a relic of mythic dimensions, and visitors often drop to their knees in tears at the sight of it.