LSAT考试逻辑推理练习题（32）

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65.A government agency publishes ratings ofairlines, ranking highest the airlines that have the smallest proportion oflate flights. The agency’s purpose is to establish an objective measure of the relative efficiency

of different airlines’personnel in meeting publishedflight schedules.

Which one of the following, if true, would tend to

invalidate use of the ratings for the agency’s purpose?

(A) Travelers sometimes have no choice of airlinesfor a given trip at a given time.

(B) Flights are often made late by bad weatherconditions that affect some airlines more that others.

(C) The flight schedules of all airlines allowextra time for flights that go into or out of very busy airports.

(D) Airline personnel are aware that the governmentagency is monitoring all airline flights for lateness.

(E) Flights are defined as“late”only if they arrive more thatfifteen minutes past their scheduled arrival time, and a record is made of howmuch alter than fifteen minutes they are.

66.Although

this bottle is labeled“vinegar,”no fizzing occurred when some of the liquid init was added to powder from this box labeled“baking soda.”But when anacidic liquid such as vinegar is added to baking soda the resulting mixturefizzes, so this bottle clearly has been mislabeled.

A flaw in the reasoning in the argument above isthat this argument

(A) ignores the possibility that the bottlecontained an acidic liquid other than vinegar

(B) fails to exclude an alternative explanation forthe observed effect

(C) depends on the use of the imprecise term“fizz”

(D) does not take into account the fact thatscientific principles can be definitively tested only under controlledlaboratory conditions

(E) assumes that the fact of a labeling error isproof of an intention to deceive

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