"Exploring the neurobiology of politics, scientists have found that liberals tolerate ambiguity and conflict better than conservatives because of how their brains work."
"Scientists at New York University and UCLA showed through a simple experiment to be reported Monday in the journal Nature Neuroscience that political orientation is related to differences in how the brain processes information."
"Analyzing the data, [Frank J. Sulloway, a researcher at UC Berkeley] said liberals were 4.9 times more likely than conservatives to show activity in the brain circuits that deal with conflicts and were 2.2 more times likely to score in the top half of the distribution for accuracy."
"Based on the results, [Sulloway] said, liberals could be expected to more readily accept new social, scientific or religious ideas."
Hence, when faced with facts and new evidence (i.e., global warming, no WMD in Iraq, etc.), cons are unable to drop the shovel and accept change; instead, they hunker down and dig faster.
I am reminded of what cognitive scientist George Lakoff said in radio interview in February 2004:
"Another mistake that liberals make is that they assume that the facts will set you free. That is, if you just talk truth to power, you'll win. It's not true. Framing is crucial. A frame always defeats the facts; if the facts don't fit the frame, the frame wins. The reason for this is that the frame is in the synapses of your brain. If the facts don't fit it, you won't make any sense."
Clearly, cons are easily bewildered by facts and strengthened by BS.