Ha clever one! I believe that there is “nothing new under the sun” …i.e. fashions come around again, the same problems re-occur in history, molecules from dead creatures get re-used in new ones etc.
So I guess if something is “improved” it is a better version of a previous thing – this means that it is “newer” i.e. by a time sort of concept (it has only recently been made – like when you say you have “new trainers”) but is not new as in completely original (has not been around before).
So I guess it is determined by what you mean by the word “new”!! 🙂
There are 18 ways of using the wrod “new” as an adjective!!
Check it out…