For some reason he also mentions this later in the article, somehow contradicting his first statement.

> Yes, without any license, your code defaults to falling under copyright law.

> In that case, legally speaking no one can reproduce, distribute, or create

> derivative works from your work. You may or may not want that. In any case,

> that's only the theory. In practice you'd find defending your rights to be

> difficult.

I am sure defending your rights in this case is no problem, assuming you have enough money. If you don't have enough power to enforce them, the same thing could probably be said about using licenses as well.