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# Marianne is a professional chess player who hums audibly while playing

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Math Expert
Joined: 02 Sep 2009
Posts: 57155
Marianne is a professional chess player who hums audibly while playing  [#permalink]

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04 Aug 2019, 12:58
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Difficulty:

15% (low)

Question Stats:

82% (01:29) correct 18% (01:38) wrong based on 78 sessions

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Marianne is a professional chess player who hums audibly while playing her matches, thereby distracting her opponents. When ordered by chess officials to cease humming or else be disqualified from professional chess, Marianne protested the order. She argued that since she was unaware of her humming, her humming was involuntary and that therefore she should not be held responsible for it.

Which one of the following, if true, most undermines Marianne’s argument against the order?

(A) The officials of chess have little or no authority to control the behavior of its professional players outside of matches.
(B) Many of the customs of amateur chess matches are not observed by professional chess players.
(C) Not all of a person’s involuntary actions are actions of which that person is unaware.
(D) A person who hums involuntarily can easily learn to notice it and can thereby come to control it.
(E) Not all of Marianne’s opponents are distracted by her humming during chess matches.

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Senior Manager
Joined: 10 Jan 2013
Posts: 265
Location: India
Concentration: General Management, Strategy
GPA: 3.95
Re: Marianne is a professional chess player who hums audibly while playing  [#permalink]

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04 Aug 2019, 20:04
I marked D

We have to undermine the logic that marianne's action is involuntary.

D does exact that

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Manager
Joined: 18 Apr 2019
Posts: 59
Marianne is a professional chess player who hums audibly while playing  [#permalink]

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05 Aug 2019, 03:22
This is a good practice question and makes the test taker think hard about the last two choices C & D. The rest can be pretty much eliminated right off the bat.
(C) Not all of a person’s involuntary actions are actions of which that person is unaware.
(D) A person who hums involuntarily can easily learn to notice it and can thereby come to control it.

If we read critically we will notice that her being unaware of the humming is the premise to the conclusion that her humming was involuntary. Hence, we have to attack only her being involuntary(conclusion) and NOT her being unaware(premise).
This is the basic difference b/w C&D.
Intern
Joined: 18 May 2015
Posts: 13
Marianne is a professional chess player who hums audibly while playing  [#permalink]

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06 Aug 2019, 09:22
I eliminated answer choice C as this states "Not all". We do not know what not all can mean. Is it 75% of the involuntary actions? 25? How do we know that her specific involuntary action falls within the "Not All" category.
Marianne is a professional chess player who hums audibly while playing   [#permalink] 06 Aug 2019, 09:22
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