请教lsat t14/S4/Q15

mzyzhu

Test14/S4/Q15. At Flordyce University any student who wants to participate in a certain archaeological dig is eligible to do so but only if the student has taken at least one archaeology course and has shown an interest in the field. Many students who have shown an interest in archaeology never take even one archaeology course. Therefore, many students who want to participate in the dig will be ineligible to do so.

The flawed reasoning of which one of the following arguments is most similar to that of the argument above?

这里说的flaw是否就指第二个many student. 如果将第二个many students 改成those。 Therefore, those students who want to participate in the dig will be ineligible to do so. 事不是就对了？

mzyzhu

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weiyu

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At    Flordyce    University    any    student    who    wants    to    participate    in    a    certain    archaeological    dig    is    eligible    to    do    so(结论)    but    only    if    the    student    has    taken    at    least    one    archaeology    course(必要条件1)    and    has    shown    an    interest    in    the    field(必要挑拣2).    Many    students    who    have    shown    an    interest    in    archaeology    never    take    even    one    archaeology    course(没有必要条件1).    Therefore,    many    students    who    want    to    participate    in    the    dig    will    be    ineligible    to    do    so(结论取非).    

The flawed reasoning of which one of the following arguments is most similar to that of the argument above?

(A) Theoretically, any jar is worth saving regardless of its size, but only if it has a lid. Therefore, since some jars are sure not to have lids, there are certain sizes of jar that are actually not worth saving.

(B) For a horse that is well schooled to be ideal for beginning riders that horse must also be surefooted and gentle. Many horses that are surefooted are not gentle. Therefore many well-schooled horses are not ideal for beginning riders.

(C) If an author’s first novel has a romantic setting and a suspenseful plot, it will become a best-seller. Since many authors’ first novels have neither, not many first novels become best-sellers.

(D) Any automobile that is more than a few years old is eventually sure to need repairs if it is not regularly maintained. Many automobiles are more than a few years old, but still do not need repairs. Therefore, many automobiles are regularly maintained.（B）

(E) An expensive new building will prove to be a good investment only if it is aesthetically pleasing or provides lots of office space. However, since many expensive new buildings are not aesthetically pleasing, few expensive new buildings will prove to be good investments.

所以B is right.