L. West, stripping away what West argues are the impure, later additions to the original written text.

NEWYORKER: Battle Lines

Of the impure variety, however, there was much more acceptance, with 84% of doctors believing that they were OK in some circumstances.

FORBES: Is It Ethical For Doctors To Prescribe Placebo?

To others, they are easily lured and eventually succumb to the impure motives and greed that have polluted the sports memorabilia industry.

FORBES: Buyer Beware: The Fragility Of The Sports Memorabilia Industry

It exploits the minute variations in vibration frequency that cause the problem in isotopically impure diamonds in the first place.

ECONOMIST: Diamonds

The motives behind the board's creation may be impure, but the move itself -- if done correctly -- is just what Indonesia needs to begin repairing its shattered economy.

FORBES: Fact and Comment

And so even the ones who had impure thoughts about raising taxes in return for cuts got nowhere.

WSJ: The Weekend Interview with Grover Norquist: Washington Enemy No. 1

There is a great possibility that the reactor will be decommissioned as the injection of sea water containing salt and impure substances will make it difficult to operate it safely again, experts say.

FORBES: Russia to Boost Energy Supplies to Japan After Quake-Ria Novosti

Of course, the fact that science has not, to date, shown conclusively that chocolate - pure or impure, in bar-form or egg-shaped - causes acne is unlikely to stop adults using the threat of spots to try and slow down their children's intake.

BBC: Does chocolate give you spots?

At the time the best that could be done was to produce a few very impure milliliters at a time.

FORBES: The Secret Sage

Because the donors and charities associated with school reform are very wealthy they must have impure motives.

FORBES: The Politics of Education Reform