Really interesting. I would argue that a lot of datapoints (maybe all) in fact do have a natural index. It is the fact if you are talking about Relational datab

Really interesting. I would argue that a lot of datapoints (maybe all) in fact do have a natural index. It is the fact if you are talking about Relational databases (every tables has a primary key). In a lot of scenarios it helped me a lot to think as the index as an associated pk of some database table.