By the time it's ingrained and encoded into a deep learning net...
is it still identifiable private info? And as the laws requiring such mechanisms for deletion apply to all filing systems, agnostic of the physical medium, electronic, paper or otherwise, does this also apply to people's brains? You'd have to develop some form of amnesia drug, and be sure it had no side effects. Anyway, the duty rostered lab have just finished brewing today's coffee, so I'll just pop down to get a cup... if I can remember where the kitchen is.