A difference from HCH (not the only one): As far as we can tell, an AI can’t Goodhart the past (which is why the interval is in effect). I think something similar applies to the adding-random-noise part.
A difference from HCH (not the only one): As far as we can tell, an AI can’t Goodhart the past (which is why the interval is in effect). I think something similar applies to the adding-random-noise part.