Question on "Shi Ke Yi Yuan"

Shi Ke Yi Yuan and related theses have been an important traditional poetic proposition.It was raised from a speech by Qian Zhongshu,then respected by large numbers.But with a cross-examination of this proposition,we found that:although it is historically reasonable,there are still some logical loopholes on it.On the one hand it does not apply to all the literary genre,on the other hand,even just apply to poetics it is also biased.As a result,althouth it seems unambiguous,this proposition can become a barrier to the fulldevelopment of the literature.