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aniket16c
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When exercising the muscles in one’s back, it is important, in order to maintain a healthy back, to exercise the muscles on opposite sides of the spine equally. After all, balanced muscle development is needed to maintain a healthy back, since the muscles on opposite sides of the spine must pull equally in opposing directions to keep the back in proper alignment and protect the spine.

Which one of the following is an assumption required by the argument?

Argument - Conclusion: To maintain a healthy back --> important to exercise X muscles equally
By proper exercise --> muscles on the opposite side will be pulled equally in opposite direction --> balanced muscle development --> balanced development is required to maintain a healthy back.


(A) Muscles on opposite sides of the spine that are equally well developed will be enough to keep the back in proper alignment.
- The argument states that muscles are one of the most important (necessary) NOT the only parameter required (Sufficient). Hence this is an extreme option
- Wrong

(B) Exercising the muscles on opposite sides of the spine unequally tends to lead to unbalanced muscle development.
- To maintain a healthy back --> balanced development necessary.
- Negate choice: Exercising X muscles does not tend to lead to unbalanced muscle development. Means even if same side muscles are exercised there wont be unbalanced development --> = there will be balanced development --> back will be maintained = contradicts the argument
- Correct

(C) Provided that one exercises the muscles on opposite sides of the spine equally, one will have a generally healthy back.
- The argument is similar to the option A
- Provided that = Exercising the muscles on opposite sides is the only required parameter to maintain a healthy back. = Not necessary. May be the person has a dislocated back because of some congenital condition
- Wrong

(D) If the muscles on opposite sides of the spine are exercised unequally, one’s back will be irreparably damaged.
- The culprit is "irreparably damaged". The argument says that there wont be a balanced development --> spine cannot be maintained. But may be through some surgery we can align the back. So to say "irreparably" is incorrect.
- Wrong

(E) One should exercise daily to ensure that the muscles on opposite sides of the spine keep the back in proper alignment.
- This is an out of context argument.

Dear daagh nightblade354 GMATNinjaTwo
If we modify the option D - If the muscles on opposite sides of the spine are exercised unequally, one’s back will be damaged
Can this be a better option than B as this option considers a direct effect on the final condition required to be attained than the effect proposed by option B?
Or will the two options be two close to arrive at a final answer?
Remember that we are looking for an assumption that is REQUIRED by the argument.

We don't necessarily NEED there to be damage for the argument to hold. All we need is UNBALANCED muscle development. So although (D) (both the original and your modified version) would help the argument, neither is a required assumption!
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Someone please explain problem with option a
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Can we expect such difficult question on GMAT ?
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When exercising the muscles in one’s back, it is important, in order to maintain a healthy back, to exercise the muscles on opposite sides of the spine equally. After all, balanced muscle development is needed to maintain a healthy back, since the muscles on opposite sides of the spine must pull equally in opposing directions to keep the back in proper alignment and protect the spine.

Which one of the following is an assumption required by the argument?

(A) Muscles on opposite sides of the spine that are equally well developed will be enough to keep the back in proper alignment. - WRONG. Chose this but with had my reservations about it being wrong. If it is not the case then it does impacts the result but that result is what we are not seeking. We want to know how back properly remains aligned.

(B) Exercising the muscles on opposite sides of the spine unequally tends to lead to unbalanced muscle development. - CORRECT. Two negatives stumped me like double negatives do. If does not lead to unbalanced muscle development then we are in trouble.

(C) Provided that one exercises the muscles on opposite sides of the spine equally, one will have a generally healthy back. - WRONG. It just reverses(words only) what is said in the passage already. A ----> B = B <---- A. Rephrased actually.

(D) If the muscles on opposite sides of the spine are exercised unequally, one’s back will be irreparably damaged. - WRONG. This is something that can't be said with certainty.

(E) One should exercise daily to ensure that the muscles on opposite sides of the spine keep the back in proper alignment. - WRONG. "Daily" is an exaggeration that is not said or required.

Answer A.
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Anything before FABS will be a conclusion
FABS: For, After all, because, since

Conclusion: While exercising, it is important, to maintain a healthy back, to exercise the muscles on opposite sides of the spine equally.
Intermediate conclusion: balanced muscle development is needed to maintain a healthy back
Premise: the muscles on opposite sides of the spine must pull equally in opposing directions to keep the back in proper alignment and protect the spine.

Necessary assumption can be either between premise and int. conclusion OR Int. conclusion and Conclusion.

(A) Muscles on opposite sides of the spine that are equally well developed will be enough to keep the back in proper alignment.
enough to keep? what if oxygen is also needed? Even then, conclusion holds true. NOT THE NA

(B) Exercising the muscles on opposite sides of the spine unequally tends to lead to unbalanced muscle development.
This bridges the gap between Int. conclusion and Conclusion.
balanced muscle development requires that one exercises the muscles on opposite sides of the spine equally


This choice is the contrapositive of the gap identified.

(C) Provided that one exercises the muscles on opposite sides of the spine equally, one will have a generally healthy back.
''Provided that'' is a necessary condition Marker. Argument doesn't assume that Only exercising muscles'' is a way to have healthy back.
Maybe there are 50 MORE ways to have healthy ways, and conclusion still holds true.
NOT THE NA

(D) If the muscles on opposite sides of the spine are exercised unequally, one’s back will be irreparably damaged.
Doesn't require the ''irreparable damage''. NOT THE NA

(E) One should exercise daily to ensure that the muscles on opposite sides of the spine keep the back in proper alignment.
Conclusion can be drawn properly even if ''one doesn't exercise DAILY''. NOT THE NA
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