Even with the risk for exploitation, the rule generally proves successful.

And the rules are proving difficult to live by.

In this case, the rules had proven particularly onerous.

The rule these days is, He who asserts, must prove.

They said the bill could once again pick up support if the rules proved unworkable.

Additional unbiased rules prove essential to maintaining a fair game.

His rule proved neither better nor worse than the previous one.

Once again that rule has proved to be true.

This rule proved too severe for the courts and exceptions were developed to it.

The exclusionary rule has proved its value over the years.