LSAT Sample Questions Template 3 - Free Download | Page 4
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C. The generalization is valid only for those birth years in which the last digit is one greater
than the second-to-last digit.
D. The example cannot be shown to be correct unless the truth of the generalization is already
presupposed.
E. The generalization is valid only for those birth years in which the last digit is greater than
five.
Explanation:
The generalization is only true for some birth years. A good criticism of the generalization
would show when the generalization is not true. C does just that and thus is the correct
answer.
A is incorrect. It is false that the generalization holds for all years that do not end in two zeros.
For example, 1970 is a birth year that does not end in two zeros. However, 1970 plus nine
equals 1979, and hence this is a case for which the generalization is not valid. Since this
answer choice is false, it cannot be a good criticism of the assertions.
The second answer choice is also incorrect. In the example, the last two digits of the person’s
birth year-67-are the same as the last two digits of the year of the person’s ninth
birthday-76-except reversed. Thus, the example does in fact exhibit the same principle as the
generalization.
The fourth answer choice is incorrect. The difference between 1976 and 1967 is nine. The
correctness of the first statement depends only on this fact and the fact that Roberta was born
in 1967 and was still alive in 1976. Thus, the truth of the generalization is not presupposed.
The last answer choice is also incorrect. Consider birth year 1923. a person born in 1923
would have been nine in 1932 and the generalization holds. So E is false.
5.The greatest chance for the existence of extraterrestrial life is on a planet beyond our solar
system. The Milky Way galaxy alone contains 100 billion other suns, many of which could be
accompanied by planets similar enough to Earth to make them suitable abodes of life.
The statement presupposes which of the following
A. Living creatures on another planet would probably have the same appearance as those on
Earth.
B. Life cannot exist on other planets in our solar system.
C. If the appropriate physical conditions exist, life is an inevitable consequence.
D. More than one of the suns in the galaxy is accompanied by an Earth-like planet.
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