This is the only question that most students find truly difficult on this game. Fewer than half got it right. Everyone hates rule substitution questions.
There is a way to do rule substitution questions quickly however. It’s very difficult for the test makers come up with a new rule that has the same effect. Usually their only option is to describe the effects of the rule in another way. Let’s see how to do that. Here’s the main diagram again:
Now, let’s look at the full effects of placing Fiesta before Jets and Lovebird.
- Fiesta is before J – H and L – G.
- Kangaroos is the only variable that can come before Fiesta.
I can think of two ways of phrasing this:
- Every variable except Kangaroos has to come after F.
- Only Kangaroos can come before F.
Answer A uses my second variation. A is CORRECT.
I think B and D are fairly obviously wrong. They both force something to happen that normally doesn’t have to happen. Ordinarily, Kangaroos can come after Lovebird, so B is wrong. And normally, Kangaroos can come before Fiesta, so D is wrong.
C and E are trickier to eliminate. C is the most popular wrong answer. It places Fiesta first or second. It’s true that Fiesta normally has to go in one of those positions. But that’s not all that’s true about Fiesta.
We also need the rule to force Fiesta to be before Lovebird, and answer C doesn’t do that. The rule in answer C allows this scenario:
Fiesta is second, but Lovebird is before F!
E is the second most popular answer. It says that Fiesta or Kangaroos must be first.
E is also something that has to be true normally, but we’re not looking for something that must be true. We’re looking for something that replaces the rule. This scenario is possible if we replace the rule in question with answer E:
Kangaroos is first, but Fiesta is last! That violates the normal rules.
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