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705-805 (Hard)|   Inference|         
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IanStewart
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The purpose of a general theory of art is to explain every aesthetic f 27 Jan 2020, 09:32
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I should be more clear, because my last post might be a bit misleading -- "any" is sometimes roughly synonymous with "every" (when "any one" would mean "all"), and sometimes more synonymous with "some", depending on usage:

"I can explain any physics problem" means "I can explain every physics problem"

"Are there any employees who enrolled in the pension plan?" means "Is there one or more employees enrolled in the pension plan?"
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The purpose of a general theory of art is to explain every aesthetic f 28 Jan 2020, 04:55
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IanStewart
I should be more clear, because my last post might be a bit misleading -- "any" is sometimes roughly synonymous with "every" (when "any one" would mean "all"), and sometimes more synonymous with "some", depending on usage:

"I can explain any physics problem" means "I can explain every physics problem"

"Are there any employees who enrolled in the pension plan?" means "Is there one or more employees enrolled in the pension plan?"
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Dear IanStewart,

What confuses me most is that
"cannot explain EVERY aesthetic feature" = "cannot explain SOME aesthetic feature"

This is a bit surprising for me to think about it.
Do you have a framework to deal with quantifier with the negation in front of it? Or you just go by with your instinct?

Thank you Sir! :please :please :please
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The purpose of a general theory of art is to explain every aesthetic f Updated on: 01 Feb 2020, 09:45
Originally posted by kornn on 01 Feb 2020, 04:37.
Last edited by kornn on 01 Feb 2020, 09:45, edited 2 times in total.
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Dear VeritasKarishma AnthonyRitz IanStewart MartyTargetTestPrep GMATGuruNY GMATNinja VeritasPrepBrian ChiranjeevSingh,

Is this interpretation in choice E. correct?

"NO pre-modern general theory of art explains ANY aesthetic feature of music that is not shared with painting and sculpture."

= ALL pre-modern general theory does NOT explain ANY aesthetic feature of music ...

Here, ANY here means 1 or more, NOT necessarily ALL, right?

Thank you!
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The purpose of a general theory of art is to explain every aesthetic f 01 Feb 2020, 06:34
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varotkorn,

No pre-modern general theory of art explains any aesthetic feature of music that is not shared with painting and sculpture.

Just use the negatives to counter each other and you get: pre-modern general theory of art explains any aesthetic feature of music that is shared with painting and sculpture: Aesthetic feature shared with music --> Pre modern art explains it.
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The purpose of a general theory of art is to explain every aesthetic f Updated on: 01 Feb 2020, 12:03
Originally posted by GMATGuruNY on 01 Feb 2020, 08:13.
Last edited by GMATGuruNY on 01 Feb 2020, 12:03, edited 1 time in total.
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E: No pre-modern general theory of art explains any aesthetic feature of music that is not shared with painting and sculpture.

Let's say three are pre-modern general theories (A, B and C) and three aesthetic features of music not shared with painting and sculpture (X, Y and Z).

Answer choice E conveys the following meaning:
Theory A cannot explain X.
Theory A cannot explain Y.
Theory A cannot explain Z.
In short:
Theory A can explain NONE of the three features.
Put another way:
Theory A cannot explain ANY of the three features.

Similarly:
Theory B cannot explain X.
Theory B cannot explain Y.
Theory B cannot explain Z.
In short:
Theory B can explain NONE of the three features.
Put another way:
Theory B cannot explain ANY of the three features.

Lastly:
Theory C cannot explain X.
Theory C cannot explain Y.
Theory C cannot explain Z.
In short:
Theory C can explain NONE of the three features.
Put another way:
Theory C cannot explain ANY of the three features.

The result is the following:
NONE of the three theories can explain ANY of the three features.
In other words:
NO pre-modern theory can explain ANY of the three features.
This is the meaning conveyed by E.

varotkorn


Is this interpretation in choice E. correct?

"NO pre-modern general theory of art explains ANY aesthetic feature of music that is not shared with painting and sculpture."

= ALL pre-modern general theory does NOT explain ANY aesthetic feature of music ...

Here, ANY here means 1 or more, NOT necessarily ALL, right?

Thank you!
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Your understanding seems correct.
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The purpose of a general theory of art is to explain every aesthetic f 01 Feb 2020, 09:10
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GMATGuruNY

Let's say there are three girls in John's school:
Amy, Betty and Cindy

No girl attended John's party.
Here, the number of girls who attended = 0.

All of the girls did not attend John's party.
Here, the number of girls who attended ≤ 2.
It is possible that Amy and Betty attended, but Cindy did not.
It is possible that Amy attended, but Betty and Cindy did not.
We know only the following:
It is not possible that ALL THREE GIRLS -- Amy, Betty and Cindy -- attended.

The statement in red does not convey the same meaning as the statement in blue.
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Dear GMATGuruNY,

Thank you for your response.
However, I am a little bit confused on red sentence above.

Please consider analogous examples below:
ALL of marbles are NOT mine.
Is it not the same as NO marbles are mine?

Can ALL of marbles are NOT mine. mean one marble is mine (or perhaps two marbles are mine)?

IMO, ALL of marbles are NOT mine. means ALL are NOT mine.

Similarly, when saying ALL of you are NOT good people!, can this mean one person is still a good person?

==============================================
GMATGuruNY

All of the girls did not attend John's party.
Here, the number of girls who attended ≤ 2.
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PS. I do agree with the above if the sentence were NOT ALL of the girls attended John's party.

Thank you in advance! :please :please :please
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The purpose of a general theory of art is to explain every aesthetic f 01 Feb 2020, 12:12
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varotkorn
IMO, ALL of marbles are NOT mine. means ALL are NOT mine.
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Your understanding is correct.
Given that we are discussing an LSAT CR, I've corrected my previous response to align better with the rules of formal logic and thus the rules of the LSAT.
For the purposes of the LSAT:
All A's are not B = If A, then not B.
Thus:
All of the marbles are not red = If an object is a marble, then the object is not red.
In other words:
NONE OF THE MARBLES is red.
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The purpose of a general theory of art is to explain every aesthetic f 02 Feb 2020, 22:41
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GMATFIGHTER
The purpose of a general theory of art is to explain every aesthetic feature that is found in any of the arts. Pre-modern general theories of art, however, focused primarily on painting and sculpture. Every pre-modern general theory of art, even those that succeed as theories of painting or sculpture, fails to explain some aesthetic feature of music.

The statements above, if true, most strongly support which one of following?

(A) Any general theory of art that explains the aesthetic features of painting also explains those of sculpture.
(B) A general theory of art that explains every aesthetic feature of music will achieve its purpose.
(C) Any theory of art that focus primarily on sculpture or painting cannot explain every aesthetic feature of music.
(D) No pre-modern general theory of art achieves its purpose unless music is not art.
(E) No pre-modern general theory of art explains any aesthetic feature of music that is not shared with painting and sculpture.

Source : PrepTest 36 - December 2001 LSAT #Q17
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Quote:

Is this interpretation in choice E. correct?

"NO pre-modern general theory of art explains ANY aesthetic feature of music that is not shared with painting and sculpture."

= ALL pre-modern general theory does NOT explain ANY aesthetic feature of music ...

Here, ANY here means 1 or more, NOT necessarily ALL, right?
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Yes, it is. It means:
All pre modern theories do NOT explain even one feature of music that music doesn't share with painting and sculpture.
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The purpose of a general theory of art is to explain every aesthetic f 07 Jun 2022, 06:49
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Nevernevergiveup
d) unless sth is not false means sth is true
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Nevernevergiveup

I think "unless sth is not false" means "unless sth is true" or "sth is false".

Both the negatives i.e. unless and not when removed will give us "sth is false". Please explain.
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The purpose of a general theory of art is to explain every aesthetic f 07 Jun 2022, 10:01
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Kushchokhani
I think "unless sth is not false" means "unless sth is true" or "sth is false".
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This line of reasoning is correct.

not false = true
unless = if not
not true = false

Thus:
Unless A is not false = Unless A is true = If A is not true = If A is false
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The purpose of a general theory of art is to explain every aesthetic f 01 Feb 2026, 05:01
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