@nawanp >to say that you’re giving up all the rights
There are no rights, there are only restrictions.

>what you’ve created.
Authors should not be elevated to the level of a deity just because they've published some works.


There are many possible informal licenses or public domain dedications, but doing so is a gamble as to if any such informal license would be held as valid - while the CC0 and WPDD use carefully written and tested legal language.

https://www.gnu.org/licenses/license-list.html#informal

I remember that the "WTFPL" was deemed to not be valid in a certain country, although I can't remember which one.