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20 Jul 2018, 00:54
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12. A 1955 analysis of paint samples from an Italian painting found evidence of cobalt, suggesting the use of cobalt blue, a pigment not used in Europe before 1804. The painting was thus deemed to have been produced sometime after 1804. A 2009 analysis also found cobalt, but that analysis suggested that the painting might have been produced before 1804.
Which one of the following, if true, most helps to resolve the apparent discrepancy in the information above?
(A) The 2009 analysis revealed that cobalt was located only in the topmost paint layer, which was possibly applied to conceal damage to original paint layers.
(B) The 2009 analysis used sophisticated scientific equipment that can detect much smaller amounts of cobalt than could the equipment used for the 1955 analysis.
(C) The 2009 analysis took more samples from the painting than the 1955 analysis did, though those samples were smaller.
(D) Many experts, based on the style and the subject matter of the painting, have dated the painting to the 1700s.
(E) New information that came to light in the 1990s suggested that cobalt blue was used only rarely in Italy in the years immediately following 1804.
Official LSAT
Which one of the following, if true, most helps to resolve the apparent discrepancy in the information above?
(A) The 2009 analysis revealed that cobalt was located only in the topmost paint layer, which was possibly applied to conceal damage to original paint layers.
(B) The 2009 analysis used sophisticated scientific equipment that can detect much smaller amounts of cobalt than could the equipment used for the 1955 analysis.
(C) The 2009 analysis took more samples from the painting than the 1955 analysis did, though those samples were smaller.
(D) Many experts, based on the style and the subject matter of the painting, have dated the painting to the 1700s.
(E) New information that came to light in the 1990s suggested that cobalt blue was used only rarely in Italy in the years immediately following 1804.
Official LSAT
20 Jul 2018, 01:46
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LeoGT
(A) The 2009 analysis revealed that cobalt was located only in the topmost paint layer, which was possibly applied to conceal damage to original paint layers.
- Incorrect.This doesn't help in resolving the discrepancy
(B) The 2009 analysis used sophisticated scientific equipment that can detect much smaller amounts of cobalt than could the equipment used for the 1955 analysis.
- Correct.This tells us that the equipment used in 1995 was not as advanced as the one in 2009. Hence the equipment of 1955 could have missed something.
(C) The 2009 analysis took more samples from the painting than the 1955 analysis did, though those samples were smaller.
-Incorrect. More samples doesn't mean they found something else
(D) Many experts, based on the style and the subject matter of the painting, have dated the painting to the 1700s.
-Incorrect. Expert insight doesn't prove
(E) New information that came to light in the 1990s suggested that cobalt blue was used only rarely in Italy in the years immediately following 1804.
- Irrelevant
Kudos please, if you like the explanation
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20 Jul 2018, 01:59
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Akash720
I'm afraid answer B cannot explain the discrepancy.
Key point of the argument is:
- 1995 found combat in painting. Combat is not used until 1804.
Discrepancy: Evidence suggests that painting is produced after 1804.
But 2009 analysis suggest the painting is produced before 1804.
Assumption of 1905 is combat must be use at the time the painting is created.
B says techique in 2009 can detect smaller amount. Both can detect combalt.
