SuperPrep B, Section 4 question 17

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harvardgurl4eva
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Joined: Sun Jul 19, 2009 11:54 pm

SuperPrep B, Section 4 question 17

Postby harvardgurl4eva » Fri May 14, 2010 8:35 pm

Why can the statement "Everyone who is excessively generous is not levelheaded" be rephrased as "No one who is levelheaded is excessively generous."

I thought this was conditional reasoning, and so:

EG ---> [strike]L[/strike]
L ----> [strike]EG[/strike]

What am I missing? Thanks TLS you are my favorite!

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Dany
Posts: 11580
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Re: SuperPrep B, Section 4 question 17

Postby Dany » Fri May 14, 2010 9:33 pm

I think it's:

EG <--|--> L

EG precludes L, and L precludes EG.

srpaik
Posts: 23
Joined: Sun Mar 14, 2010 9:15 am

Re: SuperPrep B, Section 4 question 17

Postby srpaik » Sat May 15, 2010 4:59 am

harvardgurl4eva wrote:Why can the statement "Everyone who is excessively generous is not levelheaded" be rephrased as "No one who is levelheaded is excessively generous."

I thought this was conditional reasoning, and so:

EG ---> [strike]L[/strike]
L ----> [strike]EG[/strike]

What am I missing? Thanks TLS you are my favorite!


You are not missing anything, and in fact, your conditional reasoning is just correct.

"Everyone who is excessively generous is not levelheaded"

EG --> [strike]L[/strike]
which is just as you did,

L --> [strike]EG[/strike]

But the next condition is "No one who is levelheaded is bold"

L --> [strike]B[/strike]


This gives us

L --> [strike]EG[/strike] and [strike]B[/strike]

Answer choice D fits perfect with this condition.
If Levelheaded, then neither B nor EG

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harvardgurl4eva
Posts: 20
Joined: Sun Jul 19, 2009 11:54 pm

Re: SuperPrep B, Section 4 question 17

Postby harvardgurl4eva » Sat May 15, 2010 10:32 am

srpaik wrote:
harvardgurl4eva wrote:Why can the statement "Everyone who is excessively generous is not levelheaded" be rephrased as "No one who is levelheaded is excessively generous."

I thought this was conditional reasoning, and so:

EG ---> [strike]L[/strike]
L ----> [strike]EG[/strike]

What am I missing? Thanks TLS you are my favorite!


You are not missing anything, and in fact, your conditional reasoning is just correct.

"Everyone who is excessively generous is not levelheaded"

EG --> [strike]L[/strike]
which is just as you did,

L --> [strike]EG[/strike]

But the next condition is "No one who is levelheaded is bold"

L --> [strike]B[/strike]


This gives us

L --> [strike]EG[/strike] and [strike]B[/strike]

Answer choice D fits perfect with this condition.
If Levelheaded, then neither B nor EG


Thanks a lot, I had misdiagrammed the second statement




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