Carolyn Hax, who writes her own syndicated advice column, feels that one can't speak of one sister without the other, so influential were they both, and at the same time.
"Any of us who do this owe them such a debt," she said. "The advice column was a backwater of the newspaper, and now it is so woven into our cultural fabric. These columns are loved and widely read, by people you wouldn't expect. That couldn't have happened without them."