> Redundancy is not error checking

Yes, you are right that DNA repair mechanisms are not technically error correction in the sense that the term is used in computer memory and storage, where any isolated error is mathematically guaranteed to be correctable. You clearly have a bio background, but my intent was to point out in a simplified way to non-bio people that biological systems do have mechanisms to deal with errors. I incorrectly assumed that you didn't have a bio background, and I can see that my message would have seemed a bit condescending- my apologies.

> While we haven't pinpointed the mechanism, we have a pretty good idea of why

I study metabolism and have observed things that aren’t compatible with any of the leading theories- which I suspect are all dead ends. We are definitely missing something big still. In particular, I feel like the big anti-aging startups are throwing good money after bad, by massively funding researchers with mostly played out dead end ideas. Tech billionaires funding this stuff are re-playing the same scenario as the ancient Chinese emperors and their mercury based elixirs of immortality in modern times IMO.