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"People tend to conform their factual beliefs to ones that are consistent with their cultural outlook, their world view," Braman says. The Cultural Cognition Project has conducted several experiments to back that up. Participants in these experiments are asked to describe their cultural beliefs. Some embrace new technology, authority and free enterprise. They are labeled the "individualistic" group. Others are suspicious of authority or of commerce and industry. Braman calls them "communitarians." In one experiment, Braman queried these subjects about something unfamiliar to them: nanotechnology — new research into tiny, molecule-sized objects that could lead to novel products. "These two groups start to polarize as soon as you start to describe some of the potential benefits and harms," Braman says. The individualists tended to like nanotechnology. The communitarians generally viewed it as dangerous. Both groups made their decisions based on the same information. "It doesn't matter whether you show them negative or positive information, they reject the information that is contrary to what they would like to believe, and they glom onto the positive information," Braman says.

"Basically the reason that people react in a close-minded way to information is that the implications of it threaten their values," says Dan Kahan, a law professor at Yale University and a member of The Cultural Cognition Project. Kahan says people test new information against their preexisting view of how the world should work. "If the implication, the outcome, can affirm your values, you think about it in a much more open-minded way," he says. And if the information doesn't, you tend to reject it. In another experiment, people read a United Nations study about the dangers of global warming. Then the researchers told the participants that the solution to global warming is to regulate industrial pollution. Many in the individualistic group then rejected the climate science. But when more nuclear power was offered as the solution, says Braman, "they said, you know, it turns out global warming is a serious problem."And for the communitarians, climate danger seemed less serious if the only solution was more nuclear power.

Opposition Republicans are using the delaying tactic at a record-setting pace. "The numbers are astonishing in this Congress," says Jim Riddlesperger, political science professor at Texas Christian University in Fort Worth. The filibuster, using seemingly endless debate to block legislative action, has become entrenched like a dandelion tap root in the midst of the shrill partisanship gripping Washington. But the filibuster is nothing new. Its use dates to the mists of Senate history, but until the civil rights era, it was rarely used.

As a matter of political philosophy, the concept of the filibuster arises from a deep-seated, historic concern among Americans that the minority not be steamrolled by the majority. It is a brake and protective device rooted in the same U.S. political sensibility that gave each state two senators regardless of population. The same impulse gave Americans the Electoral College in presidential contests — a structure from earliest U.S. history designed to give smaller population states greater influence in choosing the nation's leader. Given recent use of the filibuster by minority Republicans and the party's success in snarling the legislative process in this Congress, Democrats say the minority has gone way beyond just protecting its interests. The frequency of filibusters — plus threats to use them — are measured by the number of times the upper chamber votes on cloture. Such votes test the majority's ability to hold together 60 members to break a filibuster. In the 110th Congress of 2007-2008, with Republicans in the minority, there were a record 112 cloture votes. In the current session of Congress — the 111th — for all of 2009 and the first two months of 2010 the number already exceeds 40. The most the filibuster has been used when Democrats were in the minority was 58 times in the 106th Congress of 1999-2000.