Essentially, that rights are what you can exercise in a social context.

Any rando can imagine a right or privilege. But if you can't actually exercise it, so what?

Likewise society can decide a existent right is no longer is valid. (not the state, social consensus at whatever level)

In either situation the individual's option is to go somewhere they can *exercise the rights they hold.

Individuals generally will not continuously assert rights in contexts that result in social exclusion. 99% of the time they either conform or move to a different social context that agrees with them.

So rights aren't static, except in a dogmatic sense. They result from individuals asserting them en masse.