I tend to think that, once we get out of the realm of practicality, all of these things break down.
An example is our faculty of taste. Its ‘purpose’ is to advise us as to what to eat; but it evolved under definite conditions in which only a certain set of objects were given to it as input to appraise. So, if you give it an object going beyond that set of objects, it is entirely unpredictable what it will do; it will no longer give you worthwhile advice; it will just give you a bunch of meaninglessness.
Analogously, property rights originated to solve certain problems. So, if you start to talk of things that it never took as input when it evolved, it is entirely unpredictable what will happen.
That was not very good of an explanation; but, if you want more information, I discussed things like that in one of my recent posts.