LSAT－6－3－8

8.     The senator has long held to the general principle that no true work of art is obscene, and thus that there is no conflict between the need to encourage free artistic expression and the need to protect the sensibilities of the public from obscenity. When well-known works generally viewed as obscene are cited as possible counterexamples, the senator justifies accepting the principle by saying that if these works really are obscene then they cannot be works of art.

The senator’s reasoning contains which one of the following errors?

(A) It seeks to persuade by emotional rather than intellectual means.

(B) It contains an implicit contradiction.

(C) It relies on an assertion of the senator’s authority.

(D) It assumes what it seeks to establish.（D）

(E) It attempts to justify a position by appeal to an irrelevant consideration.

我想确认下我的想法，请各位看看对不对：

这个principle讲得是没有一个真正的艺术作品是obscene,那么意味着，若是真正的艺术作品，就不可能是obscene．而这个senator justifies accepting the principle是通过说：如果是obscene,那么就不是艺术作品了（原principle的逆否命题），也就是说他的推理错误在：要接受这个principle,却用这个principle当前提．

我理解的对吗？

因为我查不到题，所以想确认下～～

got it~~thank you