jack action
Science Advisor
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No there are not. Go on the streets and ask the average person if they know an expert where they can get qualified information: They don't know anyone. Most of them wouldn't even be able to appreciate the quality of the information. In such a case, where do you turn to?Ivan Seeking said:There are always experts you can turn to for qualified information.
Are we sure of this? There was a discussion about this here on PF, 4 years ago. The article cited from the OP has some scary revelations, here are the highlights:Ivan Seeking said:They aren't all in on some grand conspiracy.
Heart disease, which had been a relative rarity in the 1920s, was now felling middle-aged men at a frightening rate, and Americans were casting around for cause and cure. Ancel Keys provided an answer: the “diet-heart hypothesis” (for simplicity’s sake, I am calling it the “fat hypothesis”). This is the idea, now familiar, that an excess of saturated fats in the diet, from red meat, cheese, butter, and eggs, raises cholesterol, which congeals on the inside of coronary arteries, causing them to harden and narrow, until the flow of blood is staunched and the heart seizes up.
Ancel Keys was brilliant, charismatic, and combative. A friendly colleague at the University of Minnesota described him as, “direct to the point of bluntness, critical to the point of skewering”; others were less charitable. He exuded conviction at a time when confidence was most welcome. The president, the physician and the scientist formed a reassuring chain of male authority, and the notion that fatty foods were unhealthy started to take hold with doctors, and the public. (Eisenhower himself cut saturated fats and cholesterol from his diet altogether, right up until his death, in 1969, from heart disease.)
Many scientists, especially British ones, remained sceptical. The most prominent doubter was John Yudkin, then the UK’s leading nutritionist. When Yudkin looked at the data on heart disease, he was struck by its correlation with the consumption of sugar, not fat. He carried out a series of laboratory experiments on animals and humans, and observed, as others had before him, that sugar is processed in the liver, where it turns to fat, before entering the bloodstream.
Ancel Keys was intensely aware that Yudkin’s sugar hypothesis posed an alternative to his own. If Yudkin published a paper, Keys would excoriate it, and him. He called Yudkin’s theory “a mountain of nonsense”, and accused him of issuing “propaganda” for the meat and dairy industries. “Yudkin and his commercial backers are not deterred by the facts,” he said. “They continue to sing the same discredited tune.” Yudkin never responded in kind. He was a mild-mannered man, unskilled in the art of political combat.
That made him vulnerable to attack, and not just from Keys. The British Sugar Bureau dismissed Yudkin’s claims about sugar as “emotional assertions”; the World Sugar Research Organisation called his book “science fiction”. In his prose, Yudkin is fastidiously precise and undemonstrative, as he was in person. Only occasionally does he hint at how it must have felt to have his life’s work besmirched, as when he asks the reader, “Can you wonder that one sometimes becomes quite despondent about whether it is worthwhile trying to do scientific research in matters of health?”
Throughout the 1960s, Keys accumulated institutional power. He secured places for himself and his allies on the boards of the most influential bodies in American healthcare, including the American Heart Association and the National Institutes of Health. From these strongholds, they directed funds to like-minded researchers, and issued authoritative advice to the nation. “People should know the facts,” Keys told Time magazine. “Then if they want to eat themselves to death, let them.”
This apparent certainty was unwarranted: even some supporters of the fat hypothesis admitted that the evidence for it was still inconclusive. But Keys held a trump card. From 1958 to 1964, he and his fellow researchers gathered data on the diets, lifestyles and health of 12,770 middle-aged men, in Italy, Greece, Yugoslavia, Finland, Netherlands, Japan and the United States. The Seven Countries Study was finally published as a 211-page monograph in 1970. It showed a correlation between intake of saturated fats and deaths from heart disease, just as Keys had predicted. The scientific debate swung decisively behind the fat hypothesis.
John Yudkin’s scientific reputation had been all but sunk. He found himself uninvited from international conferences on nutrition. Research journals refused his papers. He was talked about by fellow scientists as an eccentric, a lone obsessive. Eventually, he became a scare story. Sheldon Reiser, one of the few researchers to continue working on the effects of refined carbohydrates and sugar through the 1970s, told Gary Taubes in 2011: “Yudkin was so discredited. He was ridiculed in a way. And anybody else who said something bad about sucrose [sugar], they’d say, ‘He’s just like Yudkin.’”
Professor John Yudkin retired from his post at Queen Elizabeth College in 1971, to write Pure, White and Deadly. The college reneged on a promise to allow him to continue to use its research facilities. It had hired a fully committed supporter of the fat hypothesis to replace him, and it was no longer deemed politic to have a prominent opponent of it on the premises. The man who had built the college’s nutrition department from scratch was forced to ask a solicitor to intervene. Eventually, a small room in a separate building was found for Yudkin.
When I asked Lustig why he was the first researcher in years to focus on the dangers of sugar, he answered: “John Yudkin. They took him down so severely – so severely – that nobody wanted to attempt it on their own.”
In a 2015 paper titled Does Science Advance One Funeral at a Time?, a team of scholars at the National Bureau of Economic Research sought an empirical basis for a remark made by the physicist Max Planck: “A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.”
The researchers identified more than 12,000 “elite” scientists from different fields. The criteria for elite status included funding, number of publications, and whether they were members of the National Academies of Science or the Institute of Medicine. Searching obituaries, the team found 452 who had died before retirement. They then looked to see what happened to the fields from which these celebrated scientists had unexpectedly departed, by analysing publishing patterns.
What they found confirmed the truth of Planck’s maxim. Junior researchers who had worked closely with the elite scientists, authoring papers with them, published less. At the same time, there was a marked increase in papers by newcomers to the field, who were less likely to cite the work of the deceased eminence. The articles by these newcomers were substantive and influential, attracting a high number of citations. They moved the whole field along.
A scientist is part of what the Polish philosopher of science Ludwik Fleck called a “thought collective”: a group of people exchanging ideas in a mutually comprehensible idiom. The group, suggested Fleck, inevitably develops a mind of its own, as the individuals in it converge on a way of communicating, thinking and feeling.
This makes scientific inquiry prone to the eternal rules of human social life: deference to the charismatic, herding towards majority opinion, punishment for deviance, and intense discomfort with admitting to error. Of course, such tendencies are precisely what the scientific method was invented to correct for, and over the long run, it does a good job of it. In the long run, however, we’re all dead, quite possibly sooner than we would be if we hadn’t been following a diet based on poor advice.
The UN’s Food and Agriculture Organisation, in a 2008 analysis of all studies of the low-fat diet, found “no probable or convincing evidence” that a high level of dietary fat causes heart disease or cancer. Another landmark review, published in 2010, in the American Society for Nutrition, and authored by, among others, Ronald Krauss, a highly respected researcher and physician at the University of California, stated “there is no significant evidence for concluding that dietary saturated fat is associated with an increased risk of CHD or CVD [coronary heart disease and cardiovascular disease]”.
Many nutritionists refused to accept these conclusions. The journal that published Krauss’s review, wary of outrage among its readers, prefaced it with a rebuttal by a former right-hand man of Ancel Keys, which implied that since Krauss’s findings contradicted every national and international dietary recommendation, they must be flawed. The circular logic is symptomatic of a field with an unusually high propensity for ignoring evidence that does not fit its conventional wisdom.
Imagine you know nothing about anything. You have been told to trust the scientists blindly. You now know this story: Do you still blindly trust scientists (from any field)? You would be crazy to do so. The fact is that scientists are also humans, having the same flaws.
It is not a scientific problem, but it is not a personal problem either. It is a social problem. It involves more than one party. You cannot blame someone for not trusting you; you have the responsibility to earn the trust of others. It is not easy to gain and gaining it from one person doesn't mean all other persons must trust you as well.Ivan Seeking said:And trust issues involving all experts is a personal problem, not a scientific problem.
Nope. It just means you trust them.Evo said:Does the fact that you trust in that person make them correct?
See the example above. This is assuming you can name a scientist, know his/her credentials, and know his/her peers. Most people have no clue about who are "the scientists" and what they actually do.Evo said:And why don't you trust the scientist that has a proven track record of honesty and accuracy, and been published and peer reviewed?
It doesn't. It just means you don't trust them.Evo said:How does your lack of trust make them wrong?
See the example above. It takes only one mistake to lose the trust of others. But worst, science is almost always invoked by non-scientists, which are not necessarily trustworthy. Once trust in a third party is gone, since we don't know what differentiates one scientist from another, they are all put in the same basket. From a post I made in another thread:Averagesupernova said:As in what reason do you have for not trusting?
jack action said:Furthermore, I don't recall hearing the scientists, per say. There are always, journalists, politicians and other people to simplify (or even alter) radically the message between their mouths and my ears because, apparently, "the common man don't understand". People who often don't even have the scientific know-how more than the common man. People who have agendas of their own. I'm baffled by the fact that I have to hear the message about the environment from a 16-year-old girl that can only say "Listen to the science." Everybody knows her name. But who are those scientists? What are they really saying? I never saw a panel of these scientists on the news. I cannot even think of one name of a scientist who actually work in the field (not just a popular scientific journalist who reads lot of papers).