Discussion
Which one of the following is an assumption required
by the argument?
*This question is included in Free Complete Section: LR-B, June '07 LSAT, question #17
| (A) | Muscles on opposite sides of the spine that are equally well developed will be enough to keep the back in proper alignment. |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 11/01/2012 03:56
Hi can anyone please explain why the answer is letter b and not a? Thank you
Posted: 07/25/2014 18:56
answer a is a conclusion not a requirement B says if you don't excise equally it will damage your spine which lead to the passage
Posted: 11/16/2012 22:04
The practitioners who formed this question failed to take into account birth defects, like spina bifida and scoliosis.
Posted: 02/06/2015 05:23
Reply: Hahha jesus Jeff keep it within the passage no outside info
Posted: 01/04/2013 12:29
Hi, why isn't the answer A?
Posted: 01/09/2013 21:12
I believe the reason why it is not A can be explained by the condition being either necessary or sufficient condition to bring the desired result. So in this case muscles development in opposite sides is a necessary condition but not sufficient condition for protecting the spins for other factors may also have an effect on it. That's how I ruled out choice A but I don't understand why it is b not c? Someone help
Posted: 01/15/2013 22:34
Hi, all -
Bereket is correct about answer [A]. The statement "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" describes a condition (back muscles pulling equally in opposite directions) that is NECESSARY for the desired result (keeping the back properly aligned). It does not state that the condition is SUFFICIENT. For example, the back may be misaligned for an unrelated reason (e.g., scoliosis) even though the muscles pull evenly. Therefore [A] is incorrect.
[C] is incorrect for much the same reason: the passage states that evenly pulling muscles are necessary for a straight back, but does not guarantee that evenly pulling muscles ALONE will have any positive effect at all.
[D] and [E] are easily eliminated, as the passage makes no reference either to the possibility of irreparable damage or to the need for daily exercise.
Thus [B], the only remaining answer, is correct. To verify this, notice that the passage states, roughly, that exercising muscles equally on both sides of the back is important because balanced muscle development is needed to keep the spine straight. This use of "because" is only legitimate if failure to exercise both sides equally leads to a significant risk of not having balanced muscle development.
Best,
Lyn
Bereket is correct about answer [A]. The statement "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" describes a condition (back muscles pulling equally in opposite directions) that is NECESSARY for the desired result (keeping the back properly aligned). It does not state that the condition is SUFFICIENT. For example, the back may be misaligned for an unrelated reason (e.g., scoliosis) even though the muscles pull evenly. Therefore [A] is incorrect.
[C] is incorrect for much the same reason: the passage states that evenly pulling muscles are necessary for a straight back, but does not guarantee that evenly pulling muscles ALONE will have any positive effect at all.
[D] and [E] are easily eliminated, as the passage makes no reference either to the possibility of irreparable damage or to the need for daily exercise.
Thus [B], the only remaining answer, is correct. To verify this, notice that the passage states, roughly, that exercising muscles equally on both sides of the back is important because balanced muscle development is needed to keep the spine straight. This use of "because" is only legitimate if failure to exercise both sides equally leads to a significant risk of not having balanced muscle development.
Best,
Lyn