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The current pattern of human consumption of resources, in which we

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The current pattern of human consumption of resources, in which we  [#permalink]

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New post 29 Nov 2014, 06:56
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The current pattern of human consumption of resources, in which we rely on nonrenewable resources, for example metal ore, must eventually change. Since there is only so much metal ore available, ultimately we must either do without or turn to renewable resources to take its place.
Which one of the following is an assumption required by the argument?

(A) There are renewable resource replacements for all of the nonrenewable resources currently being consumed.
(B) We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.
(C) A renewable resource cannot be exhausted by human consumption.
(D) Consumption of nonrenewable resources will not continue to increase in the future.
(E) Ultimately we cannot do without nonrenewable resources.

Source: PowerScore CR Bible
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Re: The current pattern of human consumption of resources, in which we  [#permalink]

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New post 29 Nov 2014, 08:14
sharmasneha wrote:
The current pattern of human consumption of resources, in which we rely on nonrenewable resources, for example metal ore, must eventually change. Since there is only so much metal ore available, ultimately we must either do without or turn to renewable resources to take its place.
Which one of the following is an assumption required by the argument?

(A) There are renewable resource replacements for all of the nonrenewable resources currently being consumed.
(B) We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.
(C) A renewable resource cannot be exhausted by human consumption.
(D) Consumption of nonrenewable resources will not continue to increase in the future.
(E) Ultimately we cannot do without nonrenewable resources.

Source: PowerScore CR Bible


The conclusion is: ultimately we must either do without or turn to renewable resources to take its place


A) The last sentence of the passage contradicts this by saying that there is a possibility that we won't have/use renewable resources: "we must either do without or turn to renewable resources..."
B) "Since there is only so much metal ore available" that line identifies only one type of renewable resource. There could be others that we could use. But the passage's claim that "we MUST either do without or turn to renewable resources..." assumes that eventually we won't have the option to substitute one renewable resource with another.
C) No such claim is made in the passage. Again, the last sentence acknowledges the possibility that we may not be able to turn to renewable resources.
D) Increase or decreased consumption aren't required for the conclusion since the passage doesn't define the sustainable rate of consumption.
E) The conclusion is that we must turn to doing without or using renewable resources. Therefore, the assumption that we cannot do without contradicts the conclusion, making this incorrect.

Correct answer: B
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Re: The current pattern of human consumption of resources, in which we  [#permalink]

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New post 29 Nov 2014, 21:53
B is the assumption: We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.

NEGATION of B: We CAN indefinitely replace exhausted nonrenewable resources with other nonrenewable resources. ---------------->if we CANdo so then we MUST NOT either do without or turn to renewable resources to take its place.
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Re: The current pattern of human consumption of resources, in which we  [#permalink]

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New post 21 Jun 2015, 04:17
aditya8062,

B is the assumption: We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.
or maybe when we negate B, we get this: We cannot definitely replace exhausted nonrenewable resources with other nonrenewable resources.

NEGATION of B: We CAN indefinitely replace exhausted nonrenewable resources with other nonrenewable resources. ---------------->if we CAN do so then we MUST NOT either do without or turn to renewable resources to take its place.
if we cannot [b]definitely replace exhausted NR resources with other NR resources, then ultimately we have to turn to renewable resources. in that case, negating does not weaken the conclusion. Am i negating correctly or what is it that I am missing??[/b]
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The current pattern of human consumption of resources, in which we  [#permalink]

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New post 24 Jun 2015, 01:22
The current pattern of human consumption of resources, in which we rely on nonrenewable resources, for example metal ore, must eventually change. Since there is only so much metal ore available, ultimately we must either do without or turn to renewable resources to take its place.
Which one of the following is an assumption required by the argument?

(A) There are renewable resource replacements for all of the nonrenewable resources currently being consumed.We're
not told that there are replacements for *all* nonrenewable resources. If so we wouldn't have to do without them.

(B) We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources. Hence the argument that we will have to do without them or replace them with renewable resources.
(C) A renewable resource cannot be exhausted by human consumption. It says that nonrenewable sources have limits but not that renewable resources cannot be exhausted. In that case we'd have to do without them.
(D) Consumption of nonrenewable resources will not continue to increase in the future. The argument is that we will have to replace nonrenewable resources with renewable ones or do without them. Their rate of increase isn't relevant.
(E) Ultimately we cannot do without nonrenewable resources.It says that we may be forced to do without them.
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Re: The current pattern of human consumption of resources, in which we  [#permalink]

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New post 18 Nov 2015, 09:04
arnabs wrote:
aditya8062,

B is the assumption: We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.
or maybe when we negate B, we get this: We cannot definitely replace exhausted nonrenewable resources with other nonrenewable resources.

NEGATION of B: We CAN indefinitely replace exhausted nonrenewable resources with other nonrenewable resources. ---------------->if we CAN do so then we MUST NOT either do without or turn to renewable resources to take its place.
if we cannot [b]definitely replace exhausted NR resources with other NR resources, then ultimately we have to turn to renewable resources. in that case, negating does not weaken the conclusion. Am i negating correctly or what is it that I am missing??[/b]


When we negate B we get: We COULD indefinitely replace exhausted nonrenewable resources with other nonrenewable resources. Negating weakens the conclusion, so answer B
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Re: The current pattern of human consumption of resources, in which we  [#permalink]

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New post 25 Feb 2018, 22:07
"there is only so much metal ore available" still means that there are nonrenewable sources existing but unavailable.
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Re: The current pattern of human consumption of resources, in which we  [#permalink]

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New post 05 Dec 2018, 02:49
sharmasneha wrote:
The current pattern of human consumption of resources, in which we rely on nonrenewable resources, for example metal ore, must eventually change. Since there is only so much metal ore available, ultimately we must either do without or turn to renewable resources to take its place.
Which one of the following is an assumption required by the argument?

(A) There are renewable resource replacements for all of the nonrenewable resources currently being consumed.
(B) We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.
(C) A renewable resource cannot be exhausted by human consumption.
(D) Consumption of nonrenewable resources will not continue to increase in the future.
(E) Ultimately we cannot do without nonrenewable resources.

Source: PowerScore CR Bible


Premise:
Non-renewable resources such as metal ore are limited in supply.

Conclusion: We need to change our pattern of consumption and must either do without or turn to renewable resources to take the place of non-renewable resources.

Both the first and the last sentences are conclusion. They are not different conclusions. It is a single conclusion for which the first sentence gives a generic statement and the last sentence makes it more specific.
We need to change our pattern of consumption - generic
How? We need to do without or turn to renewable sources - specific

What is the assumption? Since non-renewable resources are limited, we need to replace them with renewable resources (or do without them). But we are assuming that we cannot replace one non renewable resource by another non renewable resource for a long long time. We are being asked to switch to renewable resources. Metal ore is limited but if it can be replaced by petrol, we may be good for a long long time. And then perhaps petrol will be replaced by natural gas and then perhaps we will use Uranium for centuries etc

(A) There are renewable resource replacements for all of the nonrenewable resources currently being consumed.
Not necessary. The conclusion mentions that we may need to do without.

(B) We cannot indefinitely replace exhausted nonrenewable resources with other nonrenewable resources.
This is an assumption as discussed above.

(C) A renewable resource cannot be exhausted by human consumption.
Not assumed in the argument. The argument only says that non-renewable resources are limited and we should switch to renewable. What will happen after some years with renewable resources, the argument doesn't say.

(D) Consumption of nonrenewable resources will not continue to increase in the future.
Not assumed in the argument. The argument just says that we need to switch now. Whether it will increase, stay the same or decrease, no idea.

(E) Ultimately we cannot do without nonrenewable resources.
Not assumed in the argument. As per the argument, it seems we can do and will have to do without nonrenewable resources.
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