Each of these is light enough to suggest to me less that the passages in question are AI-drafted and more that someone who was drafting them was talking to Claude for feedback, which is slightly different. IE, if you are writing it but asking for feedback, you will constantly get back phrasal suggestions with em dashes in them, tricolons will pass the “did Claude like it” test nicely, etc.
However this is sort of immaterial: I think I agree that this has significant Claude style tells. I am just prone to splitting hairs about where and how leakage happens, and in this specific case I expect someone proofing with and talking a little too much to Claude, and writing in an excessively formal style, as opposed to actually outsourcing the draft, which I would expect to be much more tell-heavy.
Normalized for length the number of triads is high but not absurd, which would be consistent with human-back-leakage. I would expect it to creep much higher if these were raw LLM-isms. It’s not even the highest ranking for (A + B + C) by length, this would be consistent with “at the high end for encyclicals, and the main place it varies is that the author has been accustomed to explicit instead of implicit triads”.
But this is relatively minor; if the humans have been using Claude enough to get into em dashes, towards the upper end of triad use for encyclicals, and an outlier level of explicit as opposed to implicit triads, this is not materially different from if Claude actually drafted a few of the paragraphs.
I do note that the length means that it is much more rhetoric-heavy than shorter encyclicals though. That is, much more of it is doing pure persuasion, which is where it’s natural to use this construction. At least one of these is probably restating the trinity, for example, which would be bizarre in a to-the-point message. So I am not sure it should be expected that its length-normalized count should be the same as shorter encyclicals