I find the analysis inconclusive, but it also misses a more critical point.
Christine Ford is a widely published author with many professional paper and even a book or two to her credit.
A far more persuasive approach would be to compare the writing style in the letter to writing style in her other published works.
Authors a grammatical style signature that is often quite distinct which allows identification of a documents author.
For example, GOOGLE programmers were able to analyze Barak Obama’s autobiography and determine that the real author was ex Weather Underground terrorist Bill Ayers.
A quick comparison between the letter and Fords other work would show pretty conclusively if she wrote it.
Makes more sense to me.
What was Google’s opinion re Hussein and Bill Errs?
The style of scientific papers differs substantially from that of ordinary everyday narratives. You are not likely to find similarities in vocabulary, and other similarities won't be as clear-cut or decisive. Moreover, her books and papers have co-authors, so it would be hard to get a sense of what her personal writing style is. And of course, editors and proofreaders have a lot to do with determining what the final product looks like. A copy of her thesis might give you a somewhat better picture of how she writes.
Boy....
Talk about the proper use of the ‘