In looking for the truth, the reader gets caught in the clever play with words. From the beginning to the end, the author manipulates the language as well as the reader. The memos from Dr. Seymour to Doane are another case of making the language work in the story. A study of each addition to the information of successive memo is important in relation to the power of words. The hint that he is an inferior student is added in a later memo.
All additions change the emphasis to portray the kind of student who dares to flout authority.
Also, the school pronouncements play with the language to fit the media attention. Perhaps, concerning truth in language, the book's philosophy is that of Dr. Seymour. It's what people are saying that's important. The reader cannot prove anything Jake says on his show as false. Obviously, working with the point of view of this story becomes very complicated.