"As cells read out the information stored in DNA, they do rigorous proofreading and error correction, to nip potential errors in the bud." But cells also accum

"As cells read out the information stored in DNA, they do rigorous proofreading and error correction, to nip potential errors in the bud." But cells also accumulate more and more changes in their DNA over time. The system of cells, that is a body, works until it inevitably breaks down. It is only through many trails and errors that it might be able to vaguely replicate something of itself. What does it require to implement something like this? And do we really want to? A pocket calculator that is permanently miscalculating?