PT126.S4.Q23 > Question

SECTION 1 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23 Question 24 Question 25

SECTION 2 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6

PASSAGE 2

Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13

PASSAGE 3

Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21

PASSAGE 4

Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 3 · lr

SECTION 4 · lr

The professor concludes that superheated plasma is never a factor in causing ball lightning. She supports this by saying that if it were a causal factor, then ball lightning would be intense and would rise into the air, but the ball lightning that she observed was not intense and did not rise into the air.

The professor concludes that superheated plasma is never a factor in causing ball lightning, based only on the instances of ball lightning that she observed. But what if other instances of ball lightning are intense and do rise into the air? What if different instances of ball lightning are caused by different factors?

In order to conclude that superheated plasma never causes ball lightning simply because it didn’t cause the professor’s observed ball lightning, she must assume that all instances of ball lightning have the same cause.

The professor’s argument is only about ball lightning; it doesn’t matter what does or does not cause other types of lightning. (A) fails to prove that superheated plasma never causes any instances of ball lightning.

The number of people who observed these instances of ball lightning tells us nothing about whether superheated plasma is a causal factor in other instances of ball lightning. (B) fails to establish that all instances of ball lightning have the same cause.

The fact that ball lightning can have many causal factors tells us nothing about whether or not superheated plasma can be one of those factors. (C) fails to establish that all instances of ball lightning have the same cause.

We already know that the professor’s observed ball lightning did not emit intense light. (D) fails to prove that superheated plasma never causes ball lightning, nor does it establish that all instances of ball lightning have the same cause.

The professor’s ball lightning was not intense and did not rise into the air, so superheated plasma didn’t cause it. If all types of ball lightning have the same cause, this guarantees the conclusion that superheated plasma never causes ball lightning.

PrepTest 126 - Section 4 - Question 23

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