Significant fractions of Magnifica Humanitas, the papal encylical on safeguarding the human person in the time of artificial intelligence, is written significantly by AI, most likely Claude. I currently believe Pope Leo himself was not personally responsible (encyclicals tend to be group projects), however the AI usage is likely substantial enough that it's not the result of minor brushups or AI translation:
https://linch.substack.com/p/claude-author-of-the-humanitas
Key claims:
1. Significant fractions of the recent papal encyclical are written by AI. I provide multiple lines of evidence for this.
2. We can corroborate the vibes and tonal indications with statistical evidence. Phrases and punctuation much more commonly used by AI are much more present in this papal encyclical than past encyclicals.
3. The best commercially available AI detector, Pangram, notes that some paragraphs are between 40% and 100% AI, while most paragraphs appear to be 0% AI.
1. This is unlikely to be a false positive:
1. 0% of paragraphs in past encyclicals I backtested are registered as AI.
2. Pangram in general has a very low false positive rate
4. This is overall very unlikely to be a translation artifact (including AI translation). We again have multiple lines of evidence:
1. All the most prominent signs of AI I observed in English are preserved verbatim in the Italian version, as well as in other translations.
2. The Italian version of the current encyclical also gets flagged as AI by Pangram (actually more so than the English version), though I’m not aware of academic research or rigorous testing of Pangram’s service when applied to Italian)
3. Backtesting AI translation of past encyclicals get 0% on Pangram
5. The specific AI used is most likely Claude, judging by both textual and circumstantial evidence.
6. Different sections of the encyclical have very different rates of apparent AI usage. This indicates to me that some cardinals used AI assi