I notice the "Limitations" section talks about how content only at some point touched by Claude may return a positive, and content that returns a negative may still be Claude generated. But I really would have liked for them to state explicitly that entirely false positives where a piece is fully human-written may still be marked as generated, because too many institutions with the power to ruin someone's life over that have trouble understanding the concept.
This. FN rates are cute, but FP rates will ruin an academic career or a student's work/further study choices if their content gets marked erroneously. Surely the answer is a sequence of marks?
Keen to see if they are doing something SynthID-esque?