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Diagram

by ManhattanPrepLSAT1 Thu Jul 16, 2015 4:02 pm

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Re: Diagram

by shaun_davis5 Tue Nov 24, 2015 5:26 pm

On question 13-18, would it be possible to get breakdown of the questions and answers. During my timed section practice, I missed 17 and 18, but I would like to know "why" on the correct answers as well as the wrong answers.

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Re: Diagram

by ManhattanPrepLSAT1 Thu Nov 26, 2015 5:34 am

Solutions for each question are up!
 
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Re: Diagram

by AubreyH4 Fri May 11, 2018 12:17 pm

Solution is not up for Q12
 
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Re: Diagram

by SamanthaW170 Mon May 28, 2018 1:40 pm

One of the rules for this game is that if L is not on Saturday, then L comes before F. The contrapositive of the statement is: If L is not before F (in this game, F-L, since F has to go in the beginning of the week, where it's not possible for two librarians to go on the same day), then L is on Saturday.

From the tree diagram, we see that there are four elements which have to go later in the week than F (and each has to go later in the week the one proceeding it on the chart): K-Z and M-G. This led to me conclude that F can only go on Monday or Tuesday, since K-Z and M-G need to go one each on Wednesday-Saturday.

From the diagram, we see that the only two librarians who could be on duty on Monday are F and H, since all other elements have at least one other element proceeding them.

I was thinking about these inferences, since both involve F, when I realized that if I am correct, is it ever possible for L to go before F? In other words, if F always has to go before L, then isn't L always on Saturdays?

Since the only option for the Monday librarian is F or H, if we put H first, F has to go on Tuesday, since it cannot go on Wednesday-Saturday. There would be no room for L before F.

It seems highly unlikely that a conditional rule could only play out one way in a game on the LSAT - where am I going wrong?
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Re: Diagram

by ohthatpatrick Tue May 29, 2018 1:38 pm

I think you're right that it will RARELY be the case that L - F, so it will USUALLY be the case that L is on Saturday.

But we can make L - F, given that tree, as long as we start with H.

Here's one such scenario:
H L F M G K Z

In any such scenario, we'd know that it starts
H L F
So it would have been prudent to frame this game based on whether L - F or F - L

Frame 1:
H L F M/K __ __ G/Z

Frame 2:
H/F __ __ __ __ __ L

Hope this helps.