My shadowy doubt of him became substantial doubt when I heard that.

These conditions raise substantial doubt about its ability to continue as a going concern.

If the auditor concludes that substantial doubt does not exist, he should consider the need for disclosure.

An array of problems, the opinion said, "raise substantial doubt about the Association's ability to continue as a going concern."

This raises substantial doubt about the Company's ability to continue as a going concern.

"These matters raise substantial doubt about our ability to continue on a going concern basis," the airline said.

And there is substantial doubt that those numbers are realistic.

In recent years, however, new research has raised substantial doubts about Type A behavior.

And yet there is substantial doubt within the medical profession about the efficacy of bed rest.

The company was able to raise substantial doubts in the minds of investors about whether the deal made good business sense.