An anonymous reader writes "Any democrat will tell you the republicans ignore the facts. Any republican will tell you the democrats ignore the facts. Turns out they're right. A new study monitored brain activity of partisans; they shun logic and use emotional processing centers to justify their candidate's contradictory statements. 'With their minds made up, brain activity ceased in the areas that deal with negative emotions such as disgust. But activity spiked in the circuits involved in reward, a response similar to what addicts experience when they get a fix.'"