Literally any change would count as "an experiment". Not just for algorithims but for "do people like to buy this new product". Saying there should be limited changes of algorithms is a popular "hot take" but it fundamentally doesn't make any goddamned sense.
Human experiments being activities defined by the subject instead of the object make more sense. Can you have the human-involved experiment with just the objects occur naturally?
You cannot just leave the props lying around a college campus and get a Milgram's experiment replication attempt. You cannot just have a freezing chamber or scalpels to repeat the horrors of nazi Germany and Unit 731.
Human experiments being activities defined by the subject instead of the object make more sense. Can you have the human-involved experiment with just the objects occur naturally?
You cannot just leave the props lying around a college campus and get a Milgram's experiment replication attempt. You cannot just have a freezing chamber or scalpels to repeat the horrors of nazi Germany and Unit 731.