Because the post actually listed one single source instead of listing 50, 49 or which are only tangentially related to the topic at hand?

Legitimate answer: Maybe someone has stolen my account on hacker news. Maybe someone has researched who I am, even looking at sources unavailable online. Perhaps they stopped my my home (while I was alive) and noticed that I like Apricot decaf tea. Perhaps they attended a talk where I quoted chess master, Arthur Bisguier. In that case, maybe it's a real person simulating me. But counting my fingers (five on each hand), I'm fairly convinced that I'm not an AI simulation.

Having said that, it was just three weeks ago that I spoke at OpenAI in SF. Maybe they did a whole-body substitution. (counting my fingers again...) Cheers, -Cliff

It's turtles^H^H^H^H AI all the way down.

Because the paragraphs are short, and the post is straight-forward and to the point.

Also, there are no em dashes.

AI comments are not in the spirt of and the account is basically about as in the spirit of HN as it gets.