This is the first logic game from Section II of LSAT 69, the June 2013 LSAT. A researcher is studying seven manuscripts (F, G, H, P, L, S). You must place them in order. This is a linear game.
This game can be a little difficult if you use the traditional method of ‘not’ rules to show where variables can’t go.
I used a new type of diagram the second time through that made it much simpler.
The first two rules are straightforward:
It’s the rules involving M and L that are difficult. First, they’re a bit hard to understand. They really mean that L is fifth or later, and M is third or earlier.
Second, those rules are confusing to represent. Here’s the traditional way to draw these rules:
I’ve also drawn the final rule. H can’t go fifth.
That’s how I drew the diagram when I first I did this game, and it felt slow. I kept forgetting the rules for M and L.
A Better Diagram
Your diagrams should be clear and easy to read. Here’s how I drew it the second time I did the game, and it was a lot easier:
The arcs show where M and L can go. I’ve left the final rule as a not rule: H can’t go fifth.
Now we have a simple diagram that includes three rules, and only two separate rules to remember.
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