why won't slicing lists raise IndexError?

[Jason Maldonis]

>
> This is explained in the Python tutorial for strings
> https://docs.python.org/3/tutorial/introduction.html#strings, as a list
> is a sequence just like a string it will act in exactly the same way.
>

The only relevant bit I found in that link is:  "However, out of range
slice indexes are handled gracefully when used for slicing".  I do
understand _how_ slices work, but I would really like to know a bit more
about why slices will never throw out-of-bounds IndexErrors.