The author of "the latter case" is controversial in the field of history. However, many historians think that the latter case was not written by Zhuge Liang. Personally, I think that the latter case is disguised by later generations. Obviously, the precedent written by Zhuge Liang is very sincere. After the failure of the first northern expedition to Cao Wei, Zhuge Liang took the responsibility himself. Many reasons are given, right or wrong, which are not in line with Zhuge Liang's style. Zhuge Liang is a responsible person and won't say things like "as for failure and frankness, that's beyond my understanding". "This kind of pass the buck. I think it is very likely that people in the Jin Dynasty did it. Of course, Chen Shou was already dead when this person wrote the "post-model", because there was no mention of the "post-model" in Chen Shou's "History of the Three Kingdoms", but there was a mention of the "post-model" (or "front model") made by Zhuge Liang.
In a word, the author of "The Example" can't be verified now, but it won't be Zhuge Liang (at least I think so).