Comment by dekhn

Based on: my experience working on AI for 32 years, including a decade at Google including working on large-scale model training systems that used user data and complied with various user policies around data retention, along with a few decades working in science/tech making decisions around ambiguous data.

In short, I have a well-tuned intuition and a huge set of priors, and applied them to the limited knowledge we have about this situation.