Because the fiddlier a test is, the less chance there is of a reliable answer.

But despite a half-century of study, the development guild has few reliable answers to its most important question: how to make poor economies grow?

Another disturbance at the entrance arose before anyone produced a reliable answer.

Results are often open to many interpretations and extension to a reliable quantitative answer is difficult.

He thinks we can probably get a reliable answer from him, especially with the watch for contact.

That is the biggest question about Mr. Clinton's plan, and there are no reliable answers.

But he added: "You can't always look at a label and get a reliable answer.

This is not an interrogation; there are less invasive ways to get more reliable answers.

So it has all the necessary information to give you a reliable answer.

As with any economic question, there's no simple or reliable answer.