After reading this, it kinda reminds me of a C pointer.
```c
int a = 12;
int* ptr = &ptr;
printf("%i", *ptr); // 12
a = 42;
printf("%i", *ptr); // 42
```
So after publishing, the ipns name basically acts as a pointer, even after changing the hello.txt from the docs - so the same link is still viable, although the content hash has changed (which also means that the old version of hello.txt got retired unless somehow someone pinned _that_ version via it's resolved cid - whilst resolving is just like dereferencing a pointer)