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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.

This is the largest nationally representative study to date of the toll taken by sepsis and pneumonia, two conditions often caused by deadly microbes, including the antibiotic-resistant bacteria MRSA. Such infections can lead to longer hospital stays, serious complications and even death. "In many cases, these conditions could have been avoided with better infection control in hospitals," said Ramanan Laxminarayan, Ph.D., principal investigator for Extending the Cure, a project examining antibiotic resistance based at the Washington, D.C. think-tank Resources for the Future. "Infections that are acquired during the course of a hospital stay cost the United States a staggering amount in terms of lives lost and health care costs," he said. "Hospitals and other health care providers must act now to protect patients from this growing menace." Laxminarayan and his colleagues analyzed 69 million discharge records from hospitals in 40 states and identified two conditions caused by health care-associated infections: sepsis, a potentially lethal systemic response to infection and pneumonia, an infection of the lungs and respiratory tract. The researchers looked at infections that developed after hospitalization. They zeroed in on infections that are often preventable, like a serious bloodstream infection that occurs because of a lapse in sterile technique during surgery, and discovered that the cost of such infections can be quite high: For example, people who developed sepsis after surgery stayed in the hospital 11 days longer and the infections cost an extra $33,000 to treat per person. Even worse, the team found that nearly 20 percent of people who developed sepsis after surgery died as a result of the infection. "That's the tragedy of such cases," said Anup Malani, a study co-author, investigator at Extending the Cure, and professor at the University of Chicago. "In some cases, relatively healthy people check into the hospital for routine surgery. They develop sepsis because of a lapse in infection control—and they can die." The team also looked at pneumonia, an infection that can set in if a disease-causing microbe gets into the lungs—in some cases when a dirty ventilator tube is used. They found that people who developed pneumonia after surgery, which is also thought to be preventable, stayed in the hospital an extra 14 days. Such cases cost an extra $46,000 per person to treat. In 11 percent of the cases, the patient died as a result of the pneumonia infection.

Stack's manifesto offers insight into his personal journey as a tax protester - and into the large and growing movement that attracted him. Passages of Stack's manifesto suggest that he was involved in a notorious home church scheme that was popular in the part of California where he lived before he moved to Texas, MacNab said. Stack wrote that he was part of a group who held tax code readings and "zeroed in on a section relating to the wonderful 'exemptions' that make institutions like the vulgar, corrupt Catholic Church so incredibly wealthy." He said they had "the best high-paid experienced tax lawyers in the business." MacNab said Stack likely was referring to a notorious scheme run by lawyers William Drexler and Jerome Daly. It was based on the idea that citizens could establish themselves as a church and gain the same tax exemptions afforded to religious institutions. The scheme didn't work, and Drexler and Daly were disbarred and imprisoned. If this was the operation Stack was referring to, it may have been a turning point in his life. He wrote: "That little lesson in patriotism cost me $40,000+, 10 years of my life, and set my retirement plans back to 0. It made me realize for the first time that I live in a country with an ideology that is based on a total and complete lie." This inspired him to take action, write to politicians and meet with likeminded anti-tax protesters. He wrote: "I spent countless hours on the L.A. freeways driving to meetings and any and all of the disorganized professional groups who were attempting to mount a campaign against this atrocity." His anti-tax and anti-government beliefs may also have been fueled by Section 1706, an obscure and relatively unknown change in the tax code that focused on his industry and went into effect in 1986. Section 1706 essentially removed technical workers like software engineers from a safe haven classification of "self-employed consultant," making it easier for the IRS to challenge how Information Technology companies classified their employers. An association of IT companies and industry professionals, now called TechServe Alliance, was created to protest the changes in tax law that it says singled out the industry. "It made the whole business riskier for people using independent contractors because it favored the so-called employment business model," Mark Roberts, TechServe CEO, told FoxNews.com. "It created havoc on a number of folks." Roberts was quick to condemned Stack's behavior as "an act of a very, very sick individual." "I don't see a long-term lasting effect, just a troubled wayward person acting in response to a legitimate issue. But I don't think that actually impacts the issue," Roberts said. Noting that Section 1706 was passed years ago, he added: "We still resent the fact that it singles out the industry, but folks have basically learned to adapt. It's kind of been awhile since this was a burning issue in the industry."