daretodream wrote:Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.
Which one of the following is an assumption underlying the argument in the passage?

(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems.
Incorrect : This does not talk about the cause of increased mechanical problems. Eliminated.

(B) Mechanical problems in airplanes have increased dramatically since last August.
Incorrect : It weakens the argument by providing an alternate cause for the stated effect.

(C) Mechanical problems in airplanes have not increased by 50 percent since last August.
Correct : If it is not human error then it should be mechanical error and the number of mechanical problems should not be more than that present earlier.

(D) Airlines are less reluctant to report mechanical problems than they previously were.
Incorrect : How does it matter if airlines are less reluctant or more reluctant? Eliminated.

(E) Mechanical problems in airplanes have become easier to detect since last August.
Incorrect : Clearly out of scope

mrinal2100 wrote:how does the option c weaken the argument if we take the negation approach..if Mechanical problems in airplanes have increased by 50 percent since last August ,then the reports of airplane mechanical problems should also increase in frequency by 50 percent since last August...

duongthang wrote:testluv, can I say that

in phenominon argumen

evidence is phenominon

coclusion is explanation

this is to quickly realize evidence and assumption.