But this seemingly mechanical exercise of comparing prices and calculating margins is rife with subjective interference and methodological sleights of hand.
When the parties to a workplace dispute reveal their interests which are generally their motivations, apparent sleights and jarring miscommunications, reveal the source of the problem and its relatively easy cure.
Indur Goklany, a policy analyst in the Department of Interior, has documented similar sleights of hand when it comes to predictions of food and water shortages due to global warming.