24. No mathematical proposition can be proven true by observation. It follows that it is impossible to know any mathematical proposition to be true

　　The conclusion follows logically if which one of the following is assumed?

(A) Only propositions that can be proven true can be known to be true
(B) Observation alone cannot be used to prove the truth of any proposition
(C) If a proposition can be proven true by observation then it can be known to be 　　true.
(D) Knowing a proposition to be true is impossible only if it cannot be prove true 　　by observation
(E) Knowing a proposition to be true requires proving it true by observation

25. The publisher of a best-selling self-help book had, in some promotional material, claimed that it showed readers how to become exceptionally successful. Of course everyone knows that no book can deliver to the many what by definition, must remain limited to the few exceptional success. Thus although it is clear that the publisher knowingly made a false claim. doing so should not be considered unethical in this case

　　Which one of the following principles if valid¹ most strongly supports the reasoning above?

(A) Knowingly making a false claim is unethical only if it is reasonable for 　　people to accept the claim as true
(B) Knowingly making a false claim is unethical if those making it derive² a gain 　　at the expense of those acting³ as if the claim were true.
(C) Knowingly making a false claim is unethical in only those cases in which 　　those who accept the claim as true suffer a hardship greater than the gain 　　they were anticipating
(D) Knowingly making a false claim is unethical only if there is a possibility that 　　someone will act as if the claim might be true
(E) Knowingly making a false claim is unethical in at least those cases in which 　　for someone else to discover that the claim is false that person must have 　　acted as if the claim were true

上一篇：LSAT考试全真试题四SECTION2(5) 下一篇：LSAT考试全真试题四SECTION3(1)