Research studies on the subject of misinformation show that:  

When information doesn’t square with someone’s prior beliefs,

Not all false information goes on to become a false belief -- meaning: a lasting state of incorrect knowledge -- and not all false beliefs are difficult to correct.

For example astronomy. If you were asked to explain the relationship between the Earth and the Sun, you might do so incorrectly, and a friend who understands astronomy might correct you. No big deal, you simply change your belief.

But in the time of Galileo, the view of the Earth-sun relationship was tied closely to ideas of the nature of the world, the self, and religion. If Galileo tried to correct your belief, the process wouldn't be as simple.

The crucial difference between then and now, is the IMPORTANCE of the Misperception.
 When there's no immediate threat to our understanding of the world, we change our beliefs. Problems occur when that change contradicts something we hold as important.

False beliefs stem from issues closely tied to our conception of self. False beliefs, it turns out have a great deal to do with self-identity; What kind of person am I, and what kind of person do I want to be? This self-identity issue affects all ideologies.

Facts and evidence simply aren't that effective, given how selectively they are processed and interpreted.   Strongly held beliefs continue to influence judgment, despite correction attempts … even with a supposedly conscious awareness of what is happening.

When someone believes something strongly,  new information isn't going to change their mind.  
 

I am now I'm now in my 9th year of maintaining a "normal" weight after a large weight-loss.

Accomplishing this has been incredibly hard, and, even after all these years, this task is not getting any easier for me.
See: Running DOWN the UP Escalator.

The Truth about weight-loss and maintaining weight-loss isn't something that we're EVER going to hear from Marketing Interests … (which includes most doctors and nutritionists) … however, Facing it, Understanding it, and Accepting it, can be very helpful.

Below is a recent CBS news article discussing this issue.

Obesity research confirms long-term weight-loss almost impossible. 
                          by Kelly Crowe, CBS news 6-4-14

There's a disturbing truth that is emerging from the science of obesity. After years of study, it's becoming apparent that it's nearly impossible to permanently lose weight.

As incredible as it sounds, that's what the evidence is showing. For psychologist Traci Mann, who has spent 20 years running an eating lab at the University of Minnesota, the evidence is clear. "It couldn't be easier to see," she says. "Long-term weight loss happens to only the smallest minority of people."

We all think we know someone in that rare group. They become the legends — the friend of a friend, the brother-in-law, the neighbor — the ones who really did it.

But if we check back after five or 10 years, there's a good chance they will have put the weight back on. Only about five per cent of people who try to lose weight ultimately succeed, according to the research. Those people are the outliers, but we cling to their stories as proof that losing weight is possible.

"Those kinds of stories really keep the myth alive," says University of Alberta professor Tim Caulfield, who researches and writes about health misconceptions. "You have this confirmation bias going on where people point to these very specific examples as if it's proof. But in fact those are really exceptions."

Our biology taunts us, by making short-term weight loss fairly easy. But the weight creeps back, usually after about a year, and it keeps coming back until the original weight is regained or worse.

Yesterday I answered a question from a member of a forum that I frequent.  I'm doing that again today. 

         Forum Member Asked:  

"What percentage would you say .. of those with above-normal BMI's are seriously obese? I'm pretty sure the morbidly obese comprise under 10%, but would you include others in the seriously obese category?"

 I found this an interesting question.  I thought about it; did some research; made some rough calculations; and came up with the following answer. 

There are "official" stages of obesity, using the BMI. 

Stage 1 is 30 - 34.9 BMI -- obesity

Stage 2 is 35  - 39.9 BMI -- severe obesity

Stage 3 is 40 - 49.0 BMI - morbid obesity

Stage 4 is 50 and up BMI - super obesity

Personally, I would include most of the Stage 2, severe obesity people into what I term the "seriously obese category", depending on the number of years they've spent above Stage 1.

                     
Here's some interesting information.

Managing Weight Loss Expectations
          by Dr. Arya Sharma, M.D. Dr. Sharma's Obesity Notes

While there are almost no limits to short-term weight loss goals (anyone can starve themselves thin) – the reality of long-term weight loss is rather sobering.

While diet and exercise generally provide an average long-term (3-5 years) sustainable weight loss of about 3-5% of initial weight, even bariatric surgery patients tend on average to sustain a weight loss of only 20-30% of their initial weight.

Surgery, although much safer than generally thought, still bears a risk of complications and the question is how much risk patients are willing to assume if they really knew and understood how much weight they are likely to lose with surgery.

This was the subject of a study by Christina Wee and colleagues, published in JAMA Surgery, in which they examined weight loss expectations and willingness to accept risk among patients seeking bariatric surgery.

The researchers interviewed 650 patients interested in bariatric surgery at two bariatric centres in Boston.

On average, patients expected to lose as much as 38% of their weight after surgery and expressed disappointment if they did not lose at least 26%.

In fact, 40% of patients were unwilling to undergo a treatment that would result in only 20% weight loss.

Most patients (85%) accepted some risk of dying to undergo surgery, but the median acceptable risk was only 0.1%.

On the other hand, some patients (20%) appeared more desperate, willing to accept a risk of 10% or greater.

As one may expect, there were important gender differences in these findings: while women were more likely than men to be disappointed with a 20% weight loss, they were also less likely to accept a greater mortality risk.

An important finding for clinicians was that patients with lower quality-of-life scores and those who perceived needing to lose more than 10% and 20% of weight to achieve “any” health benefits were more likely to have unrealistic weight loss expectations.

This study not only shows that most patients seeking bariatric surgery have rather unrealistic weight loss expectations but also that a substantial number may well be be disappointed with their weight loss after surgery.

It is also evident that many patients believe that they need to lose a rather s...

22 years ago at age 47, weighing 271 lbs. at a height of 5'0",  I had an RNY gastric bypass, open surgery, with NO removal of any intestine, which means that every calorie I eat is still digested, and still counts. 

The doctor's recommendation for post-surgery eating was simple. "Eat three meals a day of whatever food you want, but make half of each meal protein; avoid fried foods and sweets; and have no carbonated beverages."

My surgery was done when the procedure was still considered experimental.  At the time, it was performed here in California by only a few doctors. To get surgery, people had to travel to San Diego, stay in the hospital 2 or 3 days, then stay at a local hotel for an additional 10 post-surgery days before being released to return back home.  Follow-up care was received once a month during the surgeon's visit to one of the nearby temporary clinics located in various cities throughout California.  About five years later,  surgeons all over California began setting up specialized practices for weight-loss surgery, and coordinated with nutritionists who made specific post-surgery diet recommendations like protein shakes etc. That happened several years before laser surgery became common.

The first year after surgery my body would tolerate very little food.  Eating more than one-quarter to one-half cup of food at a time made me feel uncomfortably stuffed like after Thanksgiving dinner.  

I frequently experienced Dumping syndrome, which is caused by food passing too quickly into the small intestine. This caused immediate symptoms of flushing, weakness, fatigue, dizziness, and an intense desire to lie down. Severe episodes include feelings of nausea, and even stomach cramps.

I experienced severe dumping symptoms after just a swallow or two of fruit juice; or one or two bites of fried-or-greasy food; or a bite or two of any sweet like cookies, cake, pie, candy. I also became lactose intolerant. Milk made me feel ill, and even the tiniest bit of ice cream, with it's combination of milk and sugar, immediately made me lie-down-with-dry-heaves-ill.

Therefore, due to my weight-loss surgery, that entire first year my food intake was somewhere between 200 to 600 calories a day, which caused my weight to drop from 271 down to 161 lbs .... without dieting. This happened while I ate however much I could, of whatever food my body would tolerate.  The reason I did not binge, cheat, or quit, even when my weight-loss was slower than I believed I deserved, was because it was physically impossible for me to do so. 

Most people think that weight loss after WLS always happens rapidly.  That immense amounts of weight fall off everyone's body every week, 5-10-15 pounds, week-after-week, like on the Biggest Loser tv show.. only maybe even faster. 

However, Real Life AFTER a Gastric Bypass Surgery, works just like Real Life BEFORE a Gastric Bypass Surgery.  Even though after a RNY surgery Everyone has a smaller stomach, and Everyone eats just a small amount, the rate of weight-loss continues to be an individual matter.  Some people's bodies simply drop weight faster than other people's bodies, and surgery doesn't change that fact. 

Below is a graph of my own individual weight-loss results. This is what happened to MY body during the 64 weeks after a RNY gastric bypass surgery.  ...