Incorrect. 2.3mm of a scratch can be error corrected. Up to 10 to 12mm is interpolated, (I don’t have the data numbers as yet) which is a guess, not music. What does this interpolation sound like? And we haven’t touched on RF noise entering the optical head, PSU noise, effective jitter reduction (noted in your link). Dutchclassics.nl noted both Philips and Sony engineers saying scuffs, scratches and fingerprints caused issues with the CDM. In 1982.