It has been proven and accepted as a valid tool for the diagnosis of depersonalization disorder in a clinical setting.

It is not that different than things we are already trying to do but with less valid tools.

Both are valid tools for the job but only one is appropriate at any given time.

The legacy of the Clinton administration, like it or not, is that negotiation is a valid tool for resolving conflicts.

Anti-dumping statutes are a valid tool for enforcing fair-trade rules.

But he also found that affirmative action could be a valid tool for insuring ethnic diversity in education.

The review concluded that there is a need to develop valid and reliable tools of vision screening that can predict driving performance.

The governor's vetoes killed the conference committee as a valid tool.

The court also ruled that affirmative action could be a valid tool for insuring ethnic diversity in education.

This doesn't mean anger is not a valid or effective political tool.