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Newspaper editor: Law enforcement experts, as well as most

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Newspaper editor: Law enforcement experts, as well as most [#permalink] New post 20 Mar 2005, 23:41
00:00
A
B
C
D
E

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Newspaper editor: Law enforcement experts, as well as most citizens, have finally come to recognize that legal prohibitions against gambling all share a common flaw: no matter how diligent the effort, the laws are impossible to enforce. Ethical qualms notwithstanding, when a law fails to be effective, it should not be a law. That is why there should be no legal prohibition against gambling.

Which one of the following, if assumed, allows the argument’s conclusion to be properly drawn?

(A) No effective law is unenforceable.
(B) All enforceable laws are effective.
(C) No legal prohibitions against gambling are enforceable.
(D) Most citizens must agree with a law for the law to be effective.
(E) Most citizens must agree with a law for the law to be enforceable.
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Re: CR040121--law [#permalink] New post 21 Mar 2005, 01:23
chunjuwu wrote:
Newspaper editor: Law enforcement experts, as well as most citizens, have finally come to recognize that legal prohibitions against gambling all share a common flaw: no matter how diligent the effort, the laws are impossible to enforce. Ethical qualms notwithstanding, when a law fails to be effective, it should not be a law. That is why there should be no legal prohibition against gambling.

Which one of the following, if assumed, allows the argument’s conclusion to be properly drawn?

(A) No effective law is unenforceable.
(B) All enforceable laws are effective.
(C) No legal prohibitions against gambling are enforceable.
(D) Most citizens must agree with a law for the law to be effective.
(E) Most citizens must agree with a law for the law to be enforceable.


I think it should be A.

We need to identify the option which is
1. Assumed and
2. Aids the conclusion drawn.

Since the conclusion drawn is "there should be no legal prohibition against gambling", lets identify the options that can be rejected. Since "citizens must agree" is no assumtion (but an assertion), (D) and (E) are out.

(C) is not assumed, but is stated as a conclusion by experts and citizens, so can be rejected.

(B) and (A) are the same statement in negative and positive. However, (B) talks about "enforceable law being effective" while the reasoning in the text talks about "effectiveness of law enforced" (and if a law is not effective, it should not be effected).

Hence (A) seems a better option to me than (B).
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Re: CR040121--law [#permalink] New post 21 Mar 2005, 05:26
I am getting it as A.

"Ethical qualms notwithstanding, when a law fails to be effective, it should not be a law."

The above is more like - If X, then Y

where

X - a law fails to be effective
Y - it should not be a law.

Then, A is automatically inferred.

C is already stated.

B is outside the purview. You can see easily from Venn diagrams.

chunjuwu wrote:
Newspaper editor: Law enforcement experts, as well as most citizens, have finally come to recognize that legal prohibitions against gambling all share a common flaw: no matter how diligent the effort, the laws are impossible to enforce. Ethical qualms notwithstanding, when a law fails to be effective, it should not be a law. That is why there should be no legal prohibition against gambling.

Which one of the following, if assumed, allows the argument’s conclusion to be properly drawn?

(A) No effective law is unenforceable.
(B) All enforceable laws are effective.
(C) No legal prohibitions against gambling are enforceable.
(D) Most citizens must agree with a law for the law to be effective.
(E) Most citizens must agree with a law for the law to be enforceable.

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 [#permalink] New post 21 Mar 2005, 05:41
I'll go with (A) as well

Referring to the stem:

"no matter how diligent the effort, the laws are impossible to enforce"

States that however great be the effort, the law is impossible to enforce. Therefore, the problem originates from the fact that the law is impossible to enforce.

referring back to the stem: "when a law fails to be effective, it should not be a law"

Clearly, the law has failed to be effective and hence it shouldn't be a law. However, what is it that has rendered the law ineffective? Or, in other words, how do we know that the law has been ineffective? The reason is given by the previous argument which says that the law has been impossible to enforce. Therefore, there's a clear link between the enforcability of the law and its effectiveness.

(A) No effective law is unenforceable. - clearly brings out this meaning.

(B) All enforceable laws are effective. - Not clear. We know that a law is effective when it is enforceable. However, there is nothing stated which would lead us to believe that all enforceable laws are effective.
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 [#permalink] New post 21 Mar 2005, 21:42
law unenforceable --> Not effective
Effective ---> law enforceable

a->b, !b->!a

I'll take B
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 [#permalink] New post 22 Mar 2005, 00:23
I think from the stem "when a law fails to be effective, it should not be a law"

I can only infer that "Not effective -> law unenforceable "
but not the other way as given below.

Do correct me if I am wrong.

ywilfred wrote:
law unenforceable --> Not effective
Effective ---> law enforceable

a->b, !b->!a

I'll take B

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 [#permalink] New post 22 Mar 2005, 00:27
mallelac wrote:
I think from the stem "when a law fails to be effective, it should not be a law"

I can only infer that "Not effective -> law unenforceable "
but not the other way as given below.

Do correct me if I am wrong.

ywilfred wrote:
law unenforceable --> Not effective
Effective ---> law enforceable

a->b, !b->!a

I'll take B


you're right, I got it the other way round.
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 [#permalink] New post 22 Mar 2005, 00:28
A it should be. :-D
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 [#permalink] New post 22 Mar 2005, 07:13
A... :)
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 [#permalink] New post 22 Mar 2005, 08:16
C

conclusion :there should be no legal prohibition against gambling.

premise : Law enforcement experts, as well as most citizens, have finally come to recognize that legal prohibitions against gambling all share a common flaw: no matter how diligent the effort, the laws are impossible to enforce

assumption: No legal prohibitions against gambling are enforceable

Deny C, legal prohibitions against gambling are enforceable
then argument falls apart.

in A and B author does not say anything about effectiveness of a law and whether it can be enforced.
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 [#permalink] New post 22 Mar 2005, 08:31
Thanks

OA is A.

maaverick gave us a good explanation.
  [#permalink] 22 Mar 2005, 08:31
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