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This Logic Games question is from the October 2004 LSAT.
Before we diagram, let's think about the rules and eliminate some obviously wrong answers. The rules say Gallagher (G) visits one site and that it's from the 10th century (10). We know that we can eliminate any answer choice not containing the 2nd site (since we want a complete list of places G can't go), since the rules say site 2 is from the 9th century, not the tenth. So, A and C are gone.
We can also easily see than G can't go to the 1st or 4th sites, since the rules say that the 3rd site is more recent than those two. If one of those two were G, and thus 10, there would be nothing more recent than them! That would violate the rules. So, we can eliminate any answer choice that doesn't have the 1st and 4th sites listed, since we want a complete list of the places G can't go. So, B and D are gone and E is correct.
Remember:
Think about the rules before you start to diagram and see if you can eliminate some of the wrong answer choices or even all of them. This can work if the rules give obvious clues as to what choices can be eliminated. What's great about this is that it saves a lot of time and effort on this very tightly-timed test. But if you're not sure what the rules imply right away, go ahead and start diagramming, it's worth the time. You can't go wrong with diagramming, even if it takes a bit longer.
Thanks for the LSAT explanation post first.
ReplyDeleteI have a question here.
The condition said:"The site visited third dates from a more recent century than does either the site visited first or that visited fourth".
Does that mean the third visited site dates more recently than one of the first site and the fourth site, or both, but not always both.
Or maybe my English is just really bad.
Appreciate your help.
- Martin