- Thu Apr 13, 2017 5:46 pm
#34085
You're not alone struggling with Assumption questions, LAM, as many students (I would venture to say most) say this is their biggest challenge. That's understandable, because we are trying to get into the author's head and ferret out something that he believed but neglected to tell us. We're looking for something that was in there even though it wasn't in there.
The starting point has to be your prephrase, and that is going to come from understanding the structure of the argument. So, what did our author argue? He says (and I am paraphrasing here) processing is cheap (premise), so cost isn't the reason for the higher price (conclusion).
Now, focus on that conclusion and find the missing link back to the premise. That's going to be your prephrase. Here, you might come up with something like one of these:
"Processing is the only differentiating cost factor"
"Nothing else contributes to higher price"
These are essentially the same idea, and you could find a number of other ways to express it and they should all get you to where you need to be. The author must be assuming that the cost of the decaffeinating process is the only important cost item that makes decaf's price different than the regular stuff.
Now take that prephrase and use it as a template against all the answer choices, sorting them into losers (those that are nothing like your prephrase) and contenders (those that bear some resemblance to it, or those that you just don't understand and which may, therefore, match what you need but you can't tell because the evil geniuses at LSAC found a confusing way to word them).
In this case, answer E is a pretty good match - that the beans for decaf do not cost more eliminates one possible other cost factor besides processing.
Does C match our prephrase? Not a bit. Does competition impact price? It could, sure, but to apply that would be using outside knowledge, beyond what we were given to work with and beyond the scope of the stimulus. Does the author HAVE to assume there is little competition, allowing distributors to jack up the price without fear of losing market share? No, he doesn't. That may be why decaf costs more, but it may be due to other factors, like demand for decaf being higher or special flavor enhancers being added to decaf but not to regular, or who knows what all else. Stick with your prephrase - costs are not very different - and the right answer will be pretty obvious to you.
Not sure which answer is best? Now try the "Negation Technique" on both. Answer C, negated, would be "there is a lot of competition". Does that destroy the argument that cost is not the reason for higher price? Not at all! Maybe it weakens it a little, by eliminating one potential alternate cause for the difference, but when we negate the answer we want to lay the argument to waste, naked and shivering and crying for help. When we negate answer E, we get "the beans for decaf cost a lot more than those for regular", and that kills the argument dead, dead, dead. Cost isn't the reason? Sure it is, Jack! Look at how expensive those beans are!
That's your process, every time. Be aware of the structure of the argument and what the author wants to prove. Prephrase the missing link that he must have believed in order to make his claim. Compare your prephrase to the answers, sorting into losers and contenders. Pick the best answer, using the Negation Technique if you must (and only if you must) to choose between multiple contenders.
Give that a whirl and see if you like the way it goes. Good luck!
Adam M. Tyson
PowerScore LSAT, GRE, ACT and SAT Instructor
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