Edberg's nine double faults and 36 unforced errors proved fatal to his cause.

He shook his head, feeling a tad disillusioned that the errors of Q's youth would prove to be so mundane.

"And a costly error it has proved to be."

Karatantcheva's 29 unforced errors in 13 games proved that.

Human error often proves to be a major contributor to overall levels of risk and many deserve specific consideration.

The error proved costly as Marian drove the ball for a touchdown that extended the lead to 24-7.

Still, while these principles were being rapidly disseminated many errors and illusory fears proved less easy to eradicate.

But it's equally possible that some subtle experimental error or self-deception will prove to be the explanation.

The error charged to Jordan proved that.

Those errors of judgment and commission proved the most crucial, and the last of many in the game.