A newly discovered painting on wooden panel by Michelangelo : GMAT Critical Reasoning (CR)
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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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06 Aug 2006, 10:35
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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.
[Reveal] Spoiler: OA

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

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15 Jan 2008, 13:21
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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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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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13 Mar 2013, 20:48
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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.

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

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07 Aug 2006, 14:57
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the OA is B. This question is from MGMAT's GMAT test 2. The OE is attached below:

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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07 Aug 2006, 07:25
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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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27 Feb 2013, 05:03
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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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06 Aug 2006, 23:36
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Will go with B.

Clearly the author assumes that Michelangelo didnot work on the painting for years.
If we assume that Michelangelo worked for years on that painting then there is a high probability that he would be using the same pigments.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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06 Aug 2006, 23:48
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B !

The statement are saying that the picture was completed from 1507 to 1509. But it is possible that the picture was started in 1507, and the coin was drawn and the pigment was used, and be finished in 1510.
So, the assumption is necessary that the picture don't go over a year unfinished.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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07 Aug 2006, 06:03
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Jayanak, how could it be B? The passage clearly says that the painter worked on the painting between 1507 and 1509. How is it possible that M'Angelo didn't work on it over a course of several years. If B is true, then it means that we should have seen the cheaper pigment on the painting.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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31 May 2008, 21:16
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B - that the painting contains a coin not minted until 1507 does not mean the painting was not started before 1507. It only means the coin was likely not painted until 1507 or later. Also, the stimulus states Michelangelo chose to use the cheaper alternative when in became available in 1509 not that the old pigment was not available anywhere, so he could have used the older pigment and then later the new, cheap alternative. The stimulus assumes the paiting was worked on between 1507-09 and is assuming so assumes he did not work on it over the course of several years starting some time before 1507 and completing some years after 1509.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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09 Nov 2009, 14:44
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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?
No stocks of the abandoned pigment existed after 1509.
Michelangelo did not work on the painting over the course of several years.
The coin depicted in the painting was known to general public in 1507.
The wooden panel on which the painting was executed cannot be tested accurately for age.
Michelangelo's painting style did not change between 1507 and 1509.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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10 Nov 2009, 01:19
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noboru 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?
No stocks of the abandoned pigment existed after 1509.
Michelangelo did not work on the painting over the course of several years.
The coin depicted in the painting was known to general public in 1507.
The wooden panel on which the painting was executed cannot be tested accurately for age.
Michelangelo's painting style did not change between 1507 and 1509.

Straight to B here.

My reasoning is:

The two premises in the argument (coin and pigment) in fact illustrates that Michelangelo WAS WORKING under his painting between 1507-1509. He used some items (coin and pigment) which indicate about certain period of time. But argument says nothing about other items.

The conclusion is - Michelangelo COMPLETED (not was in a process) his painting in a certain period.

Consider this. He started painting in 1505, then in 1506 he kept painting, then in 1507 he kept painting and used a COIN, then in 1508 kept painting and used PIGMENT, but kept painting after 1509, and could COMPLETE it in 1510, for example.

B clearly states that he didn't work on painting for several years - means he completed work at the same year he started.

Hence, with B we can conclude that work was completed btw 1507 and 1509.

Last edited by bsv180985 on 10 Nov 2009, 01:37, edited 2 times in total.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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10 Nov 2009, 12:10
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This is totally confusing to me... he could have worked on it from 1500 - 1509, adding the coin in 1507 and stopping work before the pigment was abandoned. Why not?

I chose A because it seemed the least illogical... I welcome another viewpoint though!!
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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16 Dec 2010, 22:34
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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?
No stocks of the abandoned pigment existed after 1509.
Michelangelo did not work on the painting over the course of several years.
The coin depicted in the painting was known to general public in 1507.
The wooden panel on which the painting was executed cannot be tested accurately for age.
Michelangelo's painting style did not change between 1507 and 1509.
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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17 Dec 2010, 10:36
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anilnandyala 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?
No stocks of the abandoned pigment existed after 1509.
Michelangelo did not work on the painting over the course of several years.
The coin depicted in the painting was known to general public in 1507.
The wooden panel on which the painting was executed cannot be tested accurately for age.
Michelangelo's painting style did not change between 1507 and 1509.

Let's begin with finding the conclusion. The conclusion is at the beginning of the stimulus "A newly discovered painting on wooden panel by Michelangelo must have been completed after 1507 but before 1509."
The reason of how the author came to that conclusion (evidence) is given in the next two sentences. The 1st reason being that a central figure carried a coin that was not minted until the year 1507. The second being that the painting contained a pigment that Michelangelo abandoned when a cheaper alternative became available.

Question is: He may have abandoned that pigment when he made his other paintings but did he abandon the pigment he had while he was working on this particular piece of work?

He may have completed his painting on a wooden panel but it may have taken him a while before he finished it using that pigment that he later abandoned for his later works.

That's my spin on it anyway. HTH
Mari
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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25 Jul 2012, 05:41
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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.
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.

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

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26 Jul 2012, 19:20
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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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07 Aug 2006, 07:13
Why not E? Am I missing something here?

We need to see two things coin and pigments and years 1507 and 1509?
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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07 Aug 2006, 10:16
rnachloo, you explained why A is not right. Could you also explain why B is right?
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Re: A newly discovered painting on wooden panel by Michelangelo [#permalink]

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07 Aug 2006, 10:34
Guys - I am going with C here.

If the coin was not known to general public in 1507 and let's say it came to be known (even though by some means we now know that the coin was actually minted in 1507) in 1508, then the painting would have been pegged to have been drawn anytime in or after 1508 because prior to that there would have been no knowledge of the coin.

The point therefore is that the fact that the coin was known to general public in 1507 (the year it was minted) becomes a crucial LINK in pegging the time period in which the painting was drawn.
Re: A newly discovered painting on wooden panel by Michelangelo   [#permalink] 07 Aug 2006, 10:34

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