On Thu, Jun 17, 2021 at 01:49:21AM +0200, Emanuel Berg via Users list for the GNU Emacs text editor wrote:
> Drew Adams wrote:
> 
> >> What's a "deep copy"?

[...]

> deep copy = actual copy
> 
> shallow copy = copy of references?

Assignment = copy at depth 0
Shallow copy = copy at depth 1
...
42 copy = copy at depth 42
...
Deep copy = copy at depth infinite

Cheers
 - t