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03 May 2026, 09:45
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
77% (01:18) correct
23%
(01:14)
wrong
based on 88
sessions
History
Date
Time
Result
Not Attempted Yet
Safety inspector: The number of laboratory samples of rabies virus sent through the university delivery service has recently grown dangerously high. We need to limit this use of the service.
Biologist: There is no need for a limit. The university delivery service has been handling rabies virus samples for 20 years with no accidents.
As a rebuttal of the safety inspector's claim, the biologist's reasoning is flawed in that it
(A) fails to explain why the number of samples sent through the service has increased
(B) fails to focus specifically on the issue of rabies virus samples
(C) overlooks the possibility that there has been a change in the hazardousness of the rabies virus samples themselves
(D) offers no defense of the university's need for continued delivery of rabies virus samples
(E) does not address the potential for harm that is posed by the recent increase in the number of samples sent through the service
Biologist: There is no need for a limit. The university delivery service has been handling rabies virus samples for 20 years with no accidents.
As a rebuttal of the safety inspector's claim, the biologist's reasoning is flawed in that it
(A) fails to explain why the number of samples sent through the service has increased
(B) fails to focus specifically on the issue of rabies virus samples
(C) overlooks the possibility that there has been a change in the hazardousness of the rabies virus samples themselves
(D) offers no defense of the university's need for continued delivery of rabies virus samples
(E) does not address the potential for harm that is posed by the recent increase in the number of samples sent through the service
03 May 2026, 15:00
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Safety inspector: The number of laboratory samples of rabies virus sent through the university delivery service has recently grown dangerously high. We need to limit this use of the service.
Biologist: There is no need for a limit. The university delivery service has been handling rabies virus samples for 20 years with no accidents.
As a rebuttal of the safety inspector's claim, the biologist's reasoning is flawed in that it
The inspector’s point is not simply that rabies samples are being delivered. The point is that the number of samples has recently become dangerously high. The biologist replies that there have been no accidents in 20 years, but that past safety record does not directly answer the new concern about increased volume. The flaw is that the biologist ignores the changed risk level created by the recent increase.
(A) fails to explain why the number of samples sent through the service has increased
Wrong. The reason for the increase is not necessary. The issue is whether the increase creates enough risk to justify a limit.
(B) fails to focus specifically on the issue of rabies virus samples
Wrong. The biologist does focus on rabies virus samples.
(C) overlooks the possibility that there has been a change in the hazardousness of the rabies virus samples themselves
Wrong. The inspector’s concern is about the number of samples, not whether each sample has become more dangerous.
(D) offers no defense of the university's need for continued delivery of rabies virus samples
Wrong. The argument is about safety risk, not whether the deliveries are useful or necessary.
(E) does not address the potential for harm that is posed by the recent increase in the number of samples sent through the service
Correct. The biologist relies on a past accident-free record, but does not address whether the recent increase in volume creates a new danger. That is exactly the inspector’s concern.
Answer: (E)
Biologist: There is no need for a limit. The university delivery service has been handling rabies virus samples for 20 years with no accidents.
As a rebuttal of the safety inspector's claim, the biologist's reasoning is flawed in that it
The inspector’s point is not simply that rabies samples are being delivered. The point is that the number of samples has recently become dangerously high. The biologist replies that there have been no accidents in 20 years, but that past safety record does not directly answer the new concern about increased volume. The flaw is that the biologist ignores the changed risk level created by the recent increase.
(A) fails to explain why the number of samples sent through the service has increased
Wrong. The reason for the increase is not necessary. The issue is whether the increase creates enough risk to justify a limit.
(B) fails to focus specifically on the issue of rabies virus samples
Wrong. The biologist does focus on rabies virus samples.
(C) overlooks the possibility that there has been a change in the hazardousness of the rabies virus samples themselves
Wrong. The inspector’s concern is about the number of samples, not whether each sample has become more dangerous.
(D) offers no defense of the university's need for continued delivery of rabies virus samples
Wrong. The argument is about safety risk, not whether the deliveries are useful or necessary.
(E) does not address the potential for harm that is posed by the recent increase in the number of samples sent through the service
Correct. The biologist relies on a past accident-free record, but does not address whether the recent increase in volume creates a new danger. That is exactly the inspector’s concern.
Answer: (E)
10 Jun 2026, 12:29
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OE for reference:
Overview:
The safety inspector makes an argument whose conclusion is that use of the university delivery service for sending samples of rabies virus needs to be limited. The grounds given for this conclusion are that the number of such deliveries has risen recently to dangerously high levels. The biologist argues against the safety inspector's conclusion, on the grounds that for 20 years the university delivery system has been accident-free in delivering such virus samples.
The Correct Answer:
E The safety inspector does not say that it is generally too dangerous to send virus samples through the university delivery service. Instead, the safety inspector says that this practice has become too dangerous because of a significant change, namely that the number of samples has reached a dangerously high level. The biologist's response—that there have been 20 years of accident-free deliveries of such samples—fails to address this change. So the biologist's evidence is not good evidence that at the recent unprecedented level of use the delivery service is still safe. (E) points out this shortcoming in the biologist's response.
The Incorrect Answer Choices:
A If the safety inspector is correct in judging the number of samples currently being sent through the service to be unacceptably high, that number would be too high no matter why it got to be so high. So if the biologist had explained why so many more samples are being sent through the service, this would not have touched on the issue of whether the numbers now sent are unacceptably high. So (A) does not describe a flaw in the biologist's reasoning.
B The biologist, in responding to the safety inspector, does talk specifically about the safety of sending rabies virus samples through the university delivery service. Thus (B), as a description of the biologist's response, is false. So it cannot be a description of what the biologist does wrong.
C The safety inspector is concerned that the number of rabies virus samples being sent is now dangerously high. But the safety inspector never asserts that the hazardousness of the samples has increased. Indeed, nothing the safety inspector says even suggests that the hazardousness of the samples might have changed. Thus, in rebutting the safety inspector's claims, there is no need for the biologist to address the possibility that the hazardousness of the samples has changed. Therefore, (C) does not describe a flaw in the biologist's reasoning.
D In arguing for limits on, rather than the elimination of, the use of the university delivery service, the safety inspector acknowledges a legitimate need for continued delivery of rabies virus samples. Since the safety inspector does not contest the university's continuing need in this area, it would have been pointless for the biologist to offer a defense of that need. And not doing what it would have been pointless to do is not a sign of flawed reasoning.
Overview:
The safety inspector makes an argument whose conclusion is that use of the university delivery service for sending samples of rabies virus needs to be limited. The grounds given for this conclusion are that the number of such deliveries has risen recently to dangerously high levels. The biologist argues against the safety inspector's conclusion, on the grounds that for 20 years the university delivery system has been accident-free in delivering such virus samples.
The Correct Answer:
E The safety inspector does not say that it is generally too dangerous to send virus samples through the university delivery service. Instead, the safety inspector says that this practice has become too dangerous because of a significant change, namely that the number of samples has reached a dangerously high level. The biologist's response—that there have been 20 years of accident-free deliveries of such samples—fails to address this change. So the biologist's evidence is not good evidence that at the recent unprecedented level of use the delivery service is still safe. (E) points out this shortcoming in the biologist's response.
The Incorrect Answer Choices:
A If the safety inspector is correct in judging the number of samples currently being sent through the service to be unacceptably high, that number would be too high no matter why it got to be so high. So if the biologist had explained why so many more samples are being sent through the service, this would not have touched on the issue of whether the numbers now sent are unacceptably high. So (A) does not describe a flaw in the biologist's reasoning.
B The biologist, in responding to the safety inspector, does talk specifically about the safety of sending rabies virus samples through the university delivery service. Thus (B), as a description of the biologist's response, is false. So it cannot be a description of what the biologist does wrong.
C The safety inspector is concerned that the number of rabies virus samples being sent is now dangerously high. But the safety inspector never asserts that the hazardousness of the samples has increased. Indeed, nothing the safety inspector says even suggests that the hazardousness of the samples might have changed. Thus, in rebutting the safety inspector's claims, there is no need for the biologist to address the possibility that the hazardousness of the samples has changed. Therefore, (C) does not describe a flaw in the biologist's reasoning.
D In arguing for limits on, rather than the elimination of, the use of the university delivery service, the safety inspector acknowledges a legitimate need for continued delivery of rabies virus samples. Since the safety inspector does not contest the university's continuing need in this area, it would have been pointless for the biologist to offer a defense of that need. And not doing what it would have been pointless to do is not a sign of flawed reasoning.
