it is not impossible;it may be so ❍ 八股是从明朝朱洪武才开始有的，年代还不很久，废掉也～。(李六如《六十年的变迁》 Ⅰ—52)Composition of the eight-legged essays began at the time of the first emperor of the Ming Dynasty. It has not had a very long history and so its abolition seems acceptable.
未尝不可wèi chánɡ bù kě
不一定不可以。it may be done, it is not impossible, be all right