Hand-writing analysis has been with us for even longer than the "forensic linguistics" that people are using to identify this writer. But there are stumbling blocks to the approach in this case. It's a small sample and we don't have anything else we can compare it to. We need another article on a similar subject of about the same length by each of the 100 (I love that!) suspects to make a meaningful decision.
The experts look at how certain words are used, how a writer punctuates and uses paragraphs, and many other clues. The good ones claim the science is almost as solid as DNA, but that may be pushing it. More than one expert has pointed out that we don't know how much the Times altered words, phrasing or punctuation to bring the piece in line with its own style guides.
In any case, while there are writers who had a distinctive and usually recognizable style, such as Hemingway and Faulkner, both of whom had contests involving people writing a pastiche of their work, there are others who change style and voice often. Laura Lippman comes to mind. Some writers have been identified even when they use a pseudonym. Patrick Juola, presently at Duquesne University, used forensic linguistics to prove that J. K. Rowling wrote The Cuckoo's Calling, even though the name on the book cover was Robert Galbraith. Gary Taylor boosted his reputation as a Shakespearean by identifying an unattributed (and not very good) poem to the Bard.
When I was still directing plays, I had a reputation as a minor-league expert on Shakespeare. I have read most of the plays several times, acted in a dozen of them, and directed still others. While teaching, I assigned fourteen different plays at one time or another.
I read the play and disagreed. Thomas Middleton wrote a play called The Witch, which Shakespeare borrowed heavily from for the witch scenes in Macbeth. Shakespeare and Fletcher collaborated near the end of Shakespeare's career, and Cardenio--inspired by a section of Don Quixote, which was published in English in 1612--didn't fit what Shakespeare was producing at that point. I say this as someone who devoured John Barton's and Cicely Berry's books on how Shakespeare used language because they helped me direct. So does the First Folio.
Cardenio was supposedly written between The Tempest and All Is True (Henry VIII), just after The Winter's Tale and Cymbeline. I've acted in and directed separate productions of The Winter's Tale (about 20 years apart) and participated in two productions of The Tempest. Compared to them, the language in Cardenio is clumsy and immature. The cast is much smaller than in any of Shakespeare's other plays (remember, bit players often played several roles), and the structure is even more truncated than Macbeth, which is complete but always feels like something's been cut. Even on his own, John Fletcher was better than this. So was Kit Marlowe. So were the Earl of Oxford, the Earl of Derby and Francis Bacon.
Truthfully, the authorship is fine topic for yet another graduate thesis, but I don't care who wrote the plays as long as good directors and actors continue to perform them for the rest of us.
Same with the New York Times op ed.
I don't care as much about who wrote the piece as I do about the admission that the White House staff is undermining Trump's actions out of self-interest instead of taking the appropriate steps to invoke the 25th Amendment for the Greater Good.