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A newly discovered painting on wooden panel by Michelangelo

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A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post Updated on: 24 Mar 2016, 09:54
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A
B
C
D
E

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53% (01:13) correct 47% (01:17) wrong based on 4064 sessions

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A newly discovered painting on wooden panel by Michelangelo must have been completed after 1507 but before 1509. It cannot have been painted earlier than 1507 because one of its central figures carries a coin that was not minted until that year. It cannot have been painted after 1509 because it contains a pigment that Michelangelo is known to have abandoned when a cheaper alternative became available in that year.

Which of the following is an assumption on which the argument depends?


A) No stocks of the abandoned pigment existed after 1509.

B) Michelangelo did not work on the painting over the course of several years.

C) The coin depicted in the painting was known to general public in 1507.

D) The wooden panel on which the painting was executed cannot be tested accurately for age.

E) Michelangelo's painting style did not change between 1507 and 1509.

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Originally posted by shoonya on 06 Aug 2006, 11:35.
Last edited by bb on 24 Mar 2016, 09:54, edited 4 times in total.
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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 13 Mar 2013, 21:48
5
2flY wrote:
gmattokyo wrote:
I'll go with A
No stocks of the abandoned pigment existed after 1509.
- Michelangelo abandoned the pigment used to make the paint (not the paint) because cheaper version was available. There is no mention that he stopped using the existing stock. If he has spent a lot making a stock of paint, he'll use that




These were my thoughts. However, this seems to be wrong...


Yes, the reason this option is option (A) is that it is tempting to jump to it right away. But it is incorrect.

The problem here is that the option says 'No stocks existed after 1509'.
We don't need to assume that. Recall that the argument says that Michelangelo stopped using the pigment, not that the pigment was not manufactured after 1509. It is immaterial whether stock of the pigment existed after 1509. We know that Michelangelo abandoned the use of the pigment after 1509.

Look at the argument:
- The painting must have been completed after 1507 but before 1509.
- Not earlier than 1507 because one of its central figures carries a coin that was not minted until that year.
- Not after 1509 because it contains a pigment that Michelangelo is known to have abandoned when a cheaper alternative became available in 1509.

The argument clearly tells us that Michelangelo abandoned the use of the pigment in 1509. Whether he had stocks of it or not, he abandoned its use in 1509. The argument seems pretty good fit except for one thing - it says that the painting must have been COMPLETED within 1507 to 1509. That's the folly of the argument. Based on the premises, we can say for sure that he painted it during this time frame. We cannot say whether he completed it during this time.
He could have painted it over many years which would include the time frame of 1507 - 1509. When we say that he completed it before 1509, we are assuming that he did the painting in a matter of a few weeks or months, not over many years.

Hence your answer is (B)
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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 07 Aug 2006, 15:57
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1
the OA is B. This question is from MGMAT's GMAT test 2. The OE is attached below:

The correct answer is B.

The conclusion of the argument is that Michelangelo must have completed the painting between 1507 and 1509. The basis for that claim is that the painting depicts a coin that did not exist before 1507 and that it contains a pigment that Michelangelo ceased using in 1509. We are asked to find an assumption that completes the logic of this argument.

Choice A is incorrect. We do not need to assume that no stocks of the pigment existed after 1509. The argument is concerned only with the year in which Michelangelo stopped using the pigment.

Choice B is correct. In order to conclude that the painting must have been completed before 1509 on the basis of the pigment, we must assume that he did not begin the painting before 1509 using the old pigment and complete the painting after 1509 with the new pigment.

Choice C is incorrect. The fact that the general public knew of the coin in 1507 is irrelevant to the conclusion.

Choice D is incorrect. The fact that the panel cannot be tested for age does not relate to either the coin or the pigment, the two bases for the conclusion.

Choice E is incorrect. Whether Michelangelo's painting style changed during this period does not relate to either the coin or the pigment.
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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 07 Aug 2006, 08:25
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'B'

'A' says that "No stocks of the abandoned pigment existed after 1509". The question is not whether there were any stocks of the pigment available after 1509, it is whether michaelangelo used it or not. And the CR says that "it is known that MA did not use this pigment after 1509".

So I think 'A' assumption is not valid.

What is the OA and OE?
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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 25 Jul 2012, 06:41
1
vikky267 wrote:
A newly discovered painting on wooden panel by Michelangelo must have
been completed after 1507 but before 1509. It cannot have been painted
earlier than 1507 because one of its central figures carries a coin that was
not minted until that year. It cannot have been painted after 1509 because it
contains a pigment that Michelangelo is known to have abandoned when a
cheaper alternative became available in that year. Which of the following is
an assumption on which the argument depends?


A) No stocks of the abandoned pigment existed after 1509.

B) Michelangelo did not work on the painting over the course of several years.

C) The coin depicted in the painting was known to general public in 1507.

D) The wooden panel on which the painting was executed cannot be tested accurately for age.

E) Michelangelo’s painting style did not change between 1507 and 1509.


Assumptions fit in the logical gap between premises and the conclusion. Here the conclusion is that the painting must have been COMPLETED 1507-1509. Premises are 1 - the coin inclluded that was minted in 1507 and 2 - Pigment used that M. was KNOWN to abandon in 1509.

A - Existence of pigment is irrelevant because the premise says he was known to abandon the pigment regardless of its existence
B - The conclusion discusses the paintings COMPLETION, so you are assuming that if it contained pigment abandonded in 1509 it was also completed that year. You can also try negation here: Michealangelo DID work on the painting over the course of several years. The negated assumption destroys the conclusion, making it a necessary assumption.
C - This provides additional information about an already established premise, not an assumption.
D - Wooden panel age is out of scope.
E - M's painting style is not discussed in the argument therefore it is also out of scope.

KW
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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 25 Jul 2012, 16:48
Quote:
Y not E because author is concluding that painting has to be done between 1507 & 1509 and if my painting style didn't changed in between these years it did use minted coin in 1507 and adhesive use in 1509. All i am saying is this is the only option that tries to cover the gap between 1507 & 1509. Option B does not specifically mention the time frame


E is a tempting choice because it specifically mentions the years in question, but you need to remember that the purpose of the assumption is to bridge the logical gap between the premises and the conclusion. The premises do not discuss his painting style, only the coin and the pigment, so information about the painting style doesn't bridge the gap between premises and conclusion.

Part of the reason why answer choice B is tricky, though correct, is that it doesn't specifically mention either the coin or pigment. However, the length of time spent painting does directly relate to the pigment premise. If he started the painting in 1508 he would be using the old pigment, but if the painting took several years to finish he wouldn't have COMPLETED it until sometime after 1509. For our conclusion to be true (the painting was completed before the end of 1509) we have to assume that he started after 1507 and completed it before 1509, as option B states.

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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 26 Jul 2012, 20:20
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Quote:
Great Explanation ! +1 Kudos !!!
Kindly put some more light on - Assumption Negation !
It would help many of us here who are still scratching their heads after knowing that why (B) is the right answer.


Negation is a powerful technique for confirming that a statement is an assumption of the argument. The fundamental concept behind negation is that a statement is an assumption of the argument if it must be true for the conclusion to be true. Expanding on that concept, the "negative" version a necessary assumption INVALIDATES the conclusion. To test a statement to see if it's an assumption, assume that the negative version of the statement is true (negate the assumption) and see if the conclusion has been invalidated. It's a great cross-check on trickly CR questions.

The hardest part of negation is learning how to create the negative (or inverted) version of a sentence. In this problem, creating the negative isn't difficult at all. Michaelangelo did not work...Michaelangel DID work (inverted/negated). On this problem you see that the negated version of the assumption invalidates the conclusion, so it is a necessary assumption to the conclusion.

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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 27 Feb 2013, 06:03
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mun23 wrote:
A newly discovered painting on wooden panel by Michelangelo must have been completed after 1507 but before 1509. It cannot have been painted earlier than 1507 because one of its central figures carries a coin that was not minted until that year. It cannot have been painted after 1509 because it contains a pigment that Michelangelo is known to have abandoned when a cheaper alternative became available in that year.

Which of the following is an assumption on which the argument depends?
(A)No stocks of the abandoned pigment existed after 1509.
(B)Michelangelo did not work on the painting over the course of several years.
(C)The coin depicted in the painting was known to general public in 1507.
(D)The wooden panel on which the painting was executed cannot be tested accurately for age.
(E)Michelangelo's painting style did not change between 1507 and 1509.
Need explanation................


Hi,

Let's first identify the elements of the argument:

Conclusion: A newly discovered painting on wooden panel by Michelangelo must have been completed after 1507 but before 1509
Premise 1: one of its central figures carries a coin that was not minted until 1507
Premise 2: it contains a pigment that Michelangelo is known to have abandoned when a cheaper alternative became available in 1509

Pre-thinking (guessing) an assumption in this argument does not seem easy. So, instead of banging the head on pre-thinking, lets move to the option statements:

(A)No stocks of the abandoned pigment existed after 1509. - This does support the conclusion. If no pigment existed after 1509 and the painting contained this pigment, it strengthens that the painting was completed before 1509. However, does this statement necessarily need to be true for the conclusion to hold? (Remember an assumption has to be true for the conclusion to hold) The answer is No. Even if pigments existed after 1509, it doesn't break down the conclusion. If Michelangelo abandoned these pigments in 1509, then it does not really affect the conclusion whether these pigments existed or not. So, this is not a must be true statement and thus, Incorrect.

(B)Michelangelo did not work on the painting over the course of several years. - I like these kind of negated statements i.e. statements which have "not", "never" kind of words, statements which rather than presenting a possibility, eliminate one possibility. I always deal with these statements by working with their original statements, which these statements negate. So, in the given scenario, I think what would happen if "Michelangelo did work on the painting over the course of several years." - Oh... If this is so, my conclusion would fall apart. How? Because then I cannot say that the painting must have been completed before 1509 because Michelangelo might have used the pigment before 1509 but since as per given statement, he worked over several years, he might have finished in 1510 or 1511 or even later. Thus, negation of the given statement brings the argument down. Therefore, this is an assumption. Correct

(C)The coin depicted in the painting was known to general public in 1507. - This does not impact the conclusion. Whether it was known in 1507 or not, the conclusion that the painting was made after 1507 does not get impacted. Incorrect.

(D)The wooden panel on which the painting was executed cannot be tested accurately for age. - This is funny. On reading this, you should ask "So what?". This has no relevance to the argument. Incorrect

(E)Michelangelo's painting style did not change between 1507 and 1509. - This is in negative form. So, I think what if "Michelangelo's painting style did change between 1507 and 1509" - I find that even if it changed it does not really harm the conclusion. Incorrect.

Hope this helps :)

Let me know if any further clarity is needed.

Thanks,
Chiranjeev
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Re: A newly discovered painting on wooden panel by Michelangelo  [#permalink]

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New post 17 Oct 2016, 10:42
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Karthic26 wrote:
Can any kind-hearted soul explain to me why option C is wrong. According to me if the coin is not known to the people who were during the period after 1507 then it weakens the statement, I tried to negate the statement and I found it was weakening the statement. But the best contenders were Option B and Option C, of the two I shall choose option C



Negating option C does not break down the argument. Suppose the general public did NOT know about the coin - this does not imply that the painting was done BEFORE 1507. At most, it may imply that the painting was done AFTER 1507, if one considers that Michael Angelo is one among the general public. So negating C at most supports the argument, not opposes - hence cannot be an assumption.
Re: A newly discovered painting on wooden panel by Michelangelo &nbs [#permalink] 17 Oct 2016, 10:42
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