This is an explanation of the second logic game from Section IV of LSAT Preptest 36, the December 2001 LSAT.
Five phone calls are aired sequentially on a talk show. The five calls are from Felicia, Gwen, Henry, Isaac, and Mel (F, G, H, I, M). The calls are either live or taped (L, T). The calls are from Vancouver, Seattle, and Kelowna (V, S, K).
This is a linear/grouping game. We need to figure out which order the telephone calls go in, where they’re from, and whether they are live or taped.
Yikes. Fortunately, the rules let us tie down most of these variables.
First off, notice that the setup tells us how many calls come from each city. Two are from Vancouver, two from Seattle and 1 from Kelowna.
Now for the rules. I’m going to draw the first two rules together. We know that M and Isaac come before everything else. The third call is from Kelowna, and it is taped.
So M and Isaac’s calls must be before the call from Kelowna.
(I’m referring to “I” as “Isaac”, because “I” is confusing, sounds like I’m referring to myself)
The third call is the only call from Kelowna
The two Seattle calls are live. It doesn’t matter how you draw that, as long as you remember it. Here’s how I drew it:
If G and F are after H, then we know exactly where H goes: third. It can’t be any other way.
There are only five spots. Isaac and M are before H; they fill the first two spots. Since G and F come after H, H must be in the middle.
We know that H calls from Kelowna. Two of the remaining calls are from Vancouver, and two are from Seattle.
The last rule says that M and F are not from Seattle. They must be from Vancouver.
That means that Isaac and G must be from Seattle. I’ve shown this in the main diagram section.
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