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Researchers have found that when very overweight people, who tend to h

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Researchers have found that when very overweight people, who tend to h [#permalink]

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New post 10 Apr 2005, 03:56
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Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolism generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.

(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

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Re: Researchers have found that when very overweight people, who tend to h [#permalink]

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New post 11 Jun 2017, 05:11
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IMO A
Option A correctly gives a reason why recently thin people will gain weight to former level.
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Re: Researchers have found that when very overweight people, who tend to h [#permalink]

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New post 18 Jun 2017, 14:51
sriamlan wrote:
why can't D be an answer here? Even D is correct.


Hi,

D is out scope because it's talking about what has not been done and is irrelevant to the reason the conclusion that because metabolism remains constant, overweight people will always gain back the weight they lose. A good assumption would have to strengthen that conclusion, i.e that former overweight people are relatively unable to reduce their caloric intake compared to thin people in addition to having poor metabolisms. If this assumption is true as in option A, then the conclusion is more likely.

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Researchers have found that when very overweight people, who tend to h [#permalink]

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New post 08 Jul 2017, 04:53
Taku wrote:
Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolism generally remain unchanged. They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level. Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.

(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.


Premise 1 : Very overweight people (↓ metabolic rate) lose weight via dieting, metabolism remains unchanged.
Premise 2 : Very overweight people burn fewer calories < normal people.
Conclusion : Very overweight people regain weight until body size = metabolic rate

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

Negate (A), Relatively few very overweight people who have dieted down to a new weight DID NOT continue to consume substantially fewer calories than do people whose normal weight is at that level.

Upon negating (A), it weakens the argument.

The correct answer is (A).
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Re: Researchers have found that when very overweight people, who tend to h [#permalink]

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New post 27 Jul 2017, 06:59
The only reason why I didn't opt for A was because it says "Relatively few", where as the argument's conclusion generalises that all such people will regain weight.

Why is this approach wrong, since we are not supposed to leave any space for error while selecting the right answer.

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Re: Researchers have found that when very overweight people, who tend to h   [#permalink] 27 Jul 2017, 06:59

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