Over the last couple of weeks questions about the prospects for the world's most visible e-tailer have once again roiled the markets.

The questions roiled in his gut.

The question of homosexuals in the military has roiled the Pentagon in the last decade.

Ever since voters approved a small sales tax two years ago to finance the new stadium, the question of what to call it has roiled the community.

Such questions roil the brains of druids.

Unanswered, unanswerable questions roiled around in his head, following him even into sleep.

Still, questions about what impact slower growth in China, the engine for growth across much of the Pacific Rim, will have on the global economy have been roiling commodity and financial markets everywhere.

If Alcuin had no way of knowing what questions roiled around my mind, he knew well enough from whence my hostility came.

That question is roiling Japan's scholarly community these days in a debate touched off by the publication of several books and essays questioning long-held assumptions about the origin and meaning of this monument of Japanese culture.