What Nozick understands by compensation is anything that makes A indifferent (that is, A has to be just as good in his own judgement before the transgression and after the compensation) provided that A has taken reasonable precautions to avoid the situation.  He argues that compensation isn't enough, because some people will violate these boundaries, for example, without revealing his identity.  Therefore, some extra cost has to be imposed on those who violate someone else's rights. (For the sake of simplicity this discussion on deterrence is summarized in another section of this article).
It was the great Enlightenment invention of the Encyclopedia that democratized Truth–but only in relation to its reception. Wikipedia, the online encyclopedia with its million-and-counting entries in English alone has democratized the production of truths. 12 This process is not something hidden, but part of the presentation itself. Each Wikipedia page is headed by a series of tabs that, when clicked, display the encyclopedia entry, public discussion about the definition provided, the history of the entry’s production, and a final tab: “edit this page,” where a reader has the chance to become a (co)producer of knowledge by editing and rewriting the original entry. In Wikipedia the Truth is transformed from something that is into something that is becoming: built, transformed, and revised; never stable and always fluid: truth with a small “t.”