Logical ReasoningDifficulty: Medium

PT112 S3 Q22 Explanation

The retail price of decaffeinated

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsNecessary Assumption

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Stimulus

The retail price of decaffeinated coffee is considerably higher than that of regular coffee. However, the process by which coffee beans are decaffeinated is fairly simple and not very costly. Therefore, the price difference cannot be of providing decaffeinated coffee to the consumer.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
22.

The argument relies on assuming which one of

Answer choices

  1. Unsupported Comparison7% picked this

    Processing regular coffee costs more than processing

    The author is only trying to argue that processing decaff is not much more than processing regular coffee. She doesn't have to assume that processing decaff is less than processing regular coffee. If processing regular costs the same as processing decaff, this argument will work just as well.

  2. Too Broad: generally14% picked this

    Price differences between products can generally be accounted for by such factors as supply and demand, not by

    This argument is specifically about what accounts for the higher price of decaff. The author doesn't need to assume anything about what affects price differences between different types of other products.

  3. Out of Scope: competition1% picked this

    There is little competition among companies that process

    Since the author doesn't think decaff is way more pricey because of the production costs, she might speculate that the real reason the price is way higher is because there isn't enough competition to deter companies from jacking up the price. But she might believe the real reason is something else. Or she might have no idea what the real reason is. If we negate this and say, "There is LOTS of competition between companies that process decaff", would that hurt the argument in any way? Would that allow us to argue that decaff has a higher retail price because it costs more to provide decaff to the consumer? No, not at all.

  4. Weakens2% picked this

    Retail coffee-sellers do not expect that consumers are content to pay more for decaffeinated coffee

    Since this has the lovable Necessary Assumption "not", we can negate it and see if it weakens. If we negated this answer, it would strengthen. The negation would be saying that retail sellers know that they can get away with charging consumers more for decaff. That would pretty much prove the author's argument correct -- the retail price of decaff is not because there's a greater cost to provide decaff to the consumer; it's because retailers know they can just charge more (and boost their profit margin).

  5. Correct76% picked this

    The beans used for producing decaffeinated coffee do not cost much more before processing than the beans used

    Why this is right

    This also has the appealing "ruling out not", so it's ripe for negating. If we say, "Yo, author -- the beans they use for decaff do cost much more even before processing than the beans used for producing regular coffee", then we can argue that decaff coffee does cost way more to provide to the consumer, and thus that the price difference can be accounted fo by the greater cost of providing decaff. Again, the author's argument was a Part vs. Whole type of move. She thought that if the process of removing the caffeine wasn't adding a lost of cost, then the cost of providing decaff overall wouldn't be much more costly. In doing so, she failed to consider that there could be other facets of providing decaff to consumers that are much more expensive than providing regular coffee to consumers. She assumed that shipping decaff does not cost much more. She assumed that grinding and brewing decaff does not cost much more. And, as this answer is saying, she assumed that the beans themselves do not cost much more. Put another way, someone could have objected to the original argument by saying, "Decaff absolutely has a higher retail price because of its higher productions costs. Yes, the process of removing caffeine doesn't cost much, but you have to find special beans with tons of robust flavor so that when you remove the caffeine there's still a lot of rich coffee flavor. Those premium beans are very expensive."

    Skill tested: Necessary Assumption · how this choice captures the argument's function is the move to repeat next time.

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