## PT 26 Sec 2 Q16

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LateNight

Posts: 136
Joined: Fri Apr 30, 2010 4:08 am

### PT 26 Sec 2 Q16

How do you interpret this?!!

Every B which is also L is either A or C. Last year all B's that were C's were also A's. Therefore, every B which was also L was a A.

my answer: Because if all B's that were also C's were also A's, then all B's which also L's have to be A's since they can't be C's because then they would be both.

But does either or imply, one but not BOTH. In formal logic or generally means could be in either categories or both, I would take the either to mean "not both..."

Is that right?

zworykin

Posts: 438
Joined: Thu May 20, 2010 4:18 am

### Re: PT 26 Sec 2 Q16

"Either" does NOT imply "not both." It's either or both; the only eliminated possibility is 'neither.' Don't look for implications that aren't necessarily there. If it's "either but not both" then the question will say so explicitly.

LateNight

Posts: 136
Joined: Fri Apr 30, 2010 4:08 am

### Re: PT 26 Sec 2 Q16

Really?

So you are either black or white.

Then you can be both?

kk19131

Posts: 1054
Joined: Tue Jun 08, 2010 7:08 pm

### Re: PT 26 Sec 2 Q16

26????

What year is that from?

WestOfTheRest

Posts: 1397
Joined: Mon Jul 07, 2008 11:10 pm

### Re: PT 26 Sec 2 Q16

Just diagram it.

B=L --> B=A or B=C
B=C --> A
B=L --> A

zworykin

Posts: 438
Joined: Thu May 20, 2010 4:18 am

### Re: PT 26 Sec 2 Q16

LateNight wrote:Really?

So you are either black or white.

Then you can be both?

No. Bad example. The question doesn't say that, and wouldn't say that. It might say that you are either broke or unemployed, or that you are either a vegetarian or a Democrat, or that you are either Italian or a dentist.

Throw away outside ideas of how things work. This is the LSAT. The rules aren't necessarily the same. If it doesn't say "not both," then both is still an option. If both is not an option, the question will say so explicitly.

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