LSAT Logical Reasoning
The LSAT Logical Reasoning tests your ability to analyze the
persuasiveness of an argument. This section contains 25 questions and
the time limit is 35 minutes. A sample logical reasoning question looks
In the past most airline companies minimized aircraft weight to
minimize fuel costs. The safest airline seats were heavy, and airlines
equipped their planes with few of these seats. This year the seat that
has sold best to airlines has been the safest one—a clear indication
that airlines are assigning a higher priority to safe seating than to
minimizing fuel costs.
Which of the following, if true, most seriously weakens the argument
(A) Last year’s best-selling airline seat was not the safest airline
seat on the market.
(B) No airline company has announced that it would be making safe
seating a higher priority this year.
(C) The price of fuel was higher this year than it had been in most
of the years when the safest airline seats sold poorly.
(D) Because of increases in the cost of materials, all airline seats
were more expensive to manufacture this year than in any previous year.
(E) Because of technological innovations, the safest airline seat on
the market this year weighed less than most other airline seats on the
Answer with Explanation:
If the safest airline seats are now among the lightest, as choice E
says, then buying them could be part of a strategy of minimizing fuel
costs, rather than indicating a shift away from that goal. Choice E,
therefore, is the best choice.
Choice A merely confirms that seat safety has improved, and thus does
not weaken the argument. Many policy shifts take place without being
publicly announced, so choice B does not weaken the argument. Choice C
indicates that minimizing fuel costs remains a priority, but it is
neutral on whether safety has become more important, so C is incorrect.
Choice D does not distinguish between safe and unsafe seats, and is thus