June 2007, Game 2, Question 7

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Transcript

Question 7, this is a global question. Global questions benefit from your understanding the game well, so it's best to go do the solution and the local questions first, and then come back to it. The reason we know this is a global question is, it doesn't have an if attached to it. It just wants to know which of the following can't be true.

So everything that we've done so far, everything we've seen so far in the game, are things that could be true. So we're gonna look for answer choices that either were certain can't be true because of a rule, or we're gonna eliminate answer choices that we have seen before. Now answer choice A says Harvest is the last film shown on each day of the festival.

This question we can actually answer directly from our master sketch. If you look at the master diagram, it's possible for H to be the last film on Thursday, and indeed, H is always the last film on Thursday, but not on Friday. On Friday, the film has to be either G or L. So sometimes questions are short and sweet. The answer has to be A, because Harvest can't be the last film shown on each day.

G or L has to be on Friday. Questions that ask you about what could be or can't be or must be true, you do want to learn to trust your work. If you've proven an answer choice is the right level of truth that you're looking for, the other answers can't possibly be right. But just for learning's sake, let's see why we can eliminate the other answers.

So answer choice B says Limelight is shown each day of the festival. If you look back at question 10, that's something that we've already seen, we did that. Since it was possible, it's not something that can't be true. Answer choice C says Greed is shown second on each day of the festival. If you look back at the sketches that we've done so far, that's not been true ever.

It's almost true, though, in the second sketch that we drew for question 8. G is the second one on Thursday, the second one on Friday, but the only one on Saturday. But, if you think about it, there's nothing that would stop us from putting an extra L on Saturday, in before that G. So it is possible, that G could be the second film on each day of the festival.

Answer choice D says a different film is shown first on each day of the festival. Well, actually, the sketch that we just looked at, the second sketch that we drew for question 8, shows that as a possibility. L is the first film on Thursday, H is the first film on Friday, and if we don't sneak that L into Saturday, G is the first film on Saturday. Answer choice E, a different film is shown last on each day of the festival.

Well, we've seen that before too. That happened in question 8. On that one, H is the last film on Thursday, L is the last film on Friday, G is the last film on Saturday. So since we've seen it before, we know that it's not something that can't be true.

It's something that can be true. There's a reason that each wrong answer is wrong, though we would not have needed to go through all that work, because once you've proven one answer is right, that is your answer. Pick it and move on to the next question.

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