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 Administrator
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#23089
Complete Question Explanation

Method of Reasoning. The correct answer choice is (B)

The argument is that since the fire that destroyed the Municipal Building started before dawn and the last firefighters did not leave until late afternoon, and no-one could have been in the vicinity of such a large fire and yet not noticed it, Thomas must have seen the fire, because he had to go past the Municipal Building this morning.

The argument is definitely flawed. First of all, the firefighters were not necessarily engaged in fighting the fire until late afternoon. It is entirely possible that the fire had been extinguished early in the morning, and firefighters had to remain for other reasons. Thomas might have been obliged to notice either a fire or the aftermath, but it is not certain that he had to notice the fire. Furthermore, noticing a fire is not the same as seeing it. Thomas could be blind, whether or not he happens to go to a library every day.

Since the question does not ask you to identify a flaw, however, you will likely simply point out the process.

Answer choice (A) Since the evidence as a whole does not allow the conclusion to be properly drawn, it is unlikely that each part of the evidence would be sufficient. This choice is incorrect. Furthermore, you can tell that the stimulus presents many bits of evidence that work together.

Answer choice (B): This is the correct answer choice. Even though the reasoning was flawed, the argument attempts to prove that Thomas must have seen the fire by pointing out that he had to walk close enough to the fire's location to notice the fire. You can read "one thing" and "first thing" as "notice the fire," and "another thing" and "second thing" as "walk by where the fire was." Inserting those phrases will help make sense of this answer choice, which is admittedly very abstract. If you have trouble understanding such an answer choice, you could try matching the "things" and so on in the choice with the specifics of the argument, and re-evaluate the choice.

Answer choice (C) Since the stimulus never discussed temptation, or why Thomas makes his claim, this choice is incorrect.

Answer choice (D) The stimulus mentions only information about this one event, and never discusses past events.

Answer choice (E) If the argument made a generalization from specific experience, it would have been obliged to either mention people other than Thomas, or to generalize from his specific experience. Since the argument instead makes a general claim and then uses it to dispute Thomas' assertion about his experience, this answer choice is exactly the opposite of what occurs.
 Marina7
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#59222
Hello!

I have a question about “past” used in D— I thought that because the stimulus refers to a usual behaviour that I could interpret this as being “past.” Could you explain why I’m over-assuming?

Thanks!
 James Finch
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#59322
Hi Marina,

I think the issue is that you're focused on an issue that is ultimately irrelevant to the argument made in the stimulus. Whether or not Thomas "usually" goes to the library in the morning, we know he did the day of the fire, when anybody in its vicinity would have noticed it, and that Thomas's route would have had to take him by the fire. Put those premises together, and he must have seen the fire, according to the stimulus. So a method of reasoning correct answer choice will involve putting premises together to then infer the conclusion. (The conclusion is flawed, because Thomas could be blind or may have "noticed" the fire in ways that don't involve sight, but that irrelevant to the questions)

Answer choice (D) is referencing an irrelevant fact, as noted above--we only needed to know that Thomas walked to the library on the day of the fire, not whether this has happened in the past or not. As the stimulus simply states that Thomas did walk to the library on the day of the fire, (D) doesn't reflect what is in the stimulus, making it incorrect.

Contrast this to (B), which effectively restates (albeit in an obtuse manner) that establishing that Thomas walked to the library on the morning of the day of the fire, when combined with the other premises, makes the stimulus conclude that he saw the fire.

Hope this helps!
 SwanQueen
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#77367
I am still confused as to why a.c (D) is incorrect.

My interpretation of the author's assumption:
Since Thomas' usual route to the library requires that he pass by the Municipal building - the past - the author assumes he walked this same route again, and must therefore have noticed the fire - the present case.

Can someone reexplain why the above assumption is irrelevant to the argument?

As well, can someone rephrase what is the assumption that the author makes in the argument?

Many thanks!
 Jeremy Press
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#77404
Hi SwanQueen,

Let's set aside the assumption discussion for a moment, and dive straight into the language of answer choice D, which says, "relying on evidence that a certain kind of event has regularly occurred in the past as a basis for concluding that an event of that kind occurred in the present case." The underlined phrases are key.

If you take the "certain kind of event" that "regularly occurred in the past" to be Thomas walking along a specific route from his apartment to the library, the description in answer choice D goes astray at the end when it says "concluding that an event of that kind occurred in the present case." The author didn't conclude that "Thomas walked along a specific route today." Rather, the author concluded something different than that: "Thomas must have seen it [the fire]." So answer choice D's description of the parts of the argument, particularly the conclusion, isn't technically accurate.

To return to the assumption discussion for a moment, it's not so much that such an assumption would be "irrelevant" to the argument, as that the author of the argument doesn't actually make that assumption.

What you described would look like this: "Because Thomas usually walks from his apartment to the library (going past the Municipal Building, he must have walked that way today, therefore he must have seen the fire."

But our author doesn't rely on the past to determine what happened to Thomas today. Rather, our author states flat out that Thomas admits he did in fact go from his apartment to the library. So, at least as to Thomas's walking the route, there's no inference or assumption required that the present was the same as the past. Going a little further, not only is the author not assuming Thomas walked today (rather, stating it as fact), the author is also not assuming that Thomas walked a specific route. Rather, it's a fact (regardless of what Thomas usually does) that "there is no way for him to get from his apartment to the library without going past the Municipal Building." So whether or not this was his "usual" route, he had to take that route. There's no need to assume Thomas's track today was the same just because of what happened in the past. There would be no other way for Thomas to go regardless of what he did in the past.

I hope this helps!

Jeremy
 SwanQueen
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#77413
Thank you, Jeremy! :)

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