LSAT考试逻辑推理练习题（13）

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26.Investigators concluded that human failure was not responsible forthe fatal airplane crash last August, and since that time new and morestringent rules for identifying and reporting mechanical problems have been ineffect. That accounts for the fact that reports of airplane mechanical problemshave increased in frequency by 50 percent since last August.

Which one of the following is an assumptionunderlying the argument in the passage?

(A) Airplane travel is still relativelysafe, despite the increase in reported mechanical problems.

(B) Mechanical problems in airplanes haveincreased dramatically since last August.

(C) Mechanical problems in airplanes havenot increased by 50 percent since last August.

(D) Airlines are less reluctant to reportmechanical problems than they previously were.

(E) Mechanical problems in airplanes havebecome easier to detect since last August.

27．The peculiar evil of silencing the expression of an opinion is thatit robs the human race. It takes from posterity, as well as the existinggeneration, and from those who dissent from the opinion even more than fromthose who hold it. If the opinion is right, they are deprived of theopportunity of exchanging error for truth; if it is wrong, they lose what isalmost as great a benefit: the clearer perception and livelier impression oftruth, produced by its collision with error.

Which one of the following best expressesthe conclusion presented in the argument?

A. Silencing the expression of an opinion isrobbing the human race.

B. Silencing the expression of an opinionharms those who dissent more than those who agree.

C. Anyone who agrees with an opinion wouldnot want to silence its expression.

D. Gaining a clearer perception and livelierimpression of truth is a great benefit.

E. The greatest benefit is the opportunityof exchanging truth for error.

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