Hans-Hermann Hoppe contends that, by trying to convince someone by argumentation, one implicitly assumes and acknowledges the self-ownership of that someone. In other words, one cannot deny self-ownership (and consequently some form of rights) without first assuming it.
The norm implied in argumentation is that everybody has the right of exclusive control over his own body as his instrument of action and cognition. Only if there is at least an implicit recognition of each individual's property right in his own body can argumentation take place. Only as long as this right is recognized is it possible for someone to agree to what has been said in an argument and hence can what has been said be validated, or is it possible to say "no" and to agree only on the fact that there is disagreement. Indeed, anyone who would try to justify any norm would already have to presuppose the property right in his body as a valid norm, simply in order to say, "This is what I claim to be true and objective." Any person who would try to dispute the property right in his own body would become caught up in a contradiction, as arguing in this way and claiming his argument to be true, would already implicitly accept precisely this norm as being valid.
Thus it can be stated that whenever a person claims that some statement can be justified, he at least implicitly assumes the following norm to be justified: "Nobody has the right to uninvitedly aggress against the body of any other person and thus delimit or restrict anyone's control over his own body." This rule is implied in the concept of justification as argumentative justification. Justifying means justifying without having to rely on coercion. In fact, if one formulates the opposite of this rule, i.e., "everybody has the right to uninvitedly aggress against other people" (a rule, by the way, that would pass the formal test of the universalization principle!), then it is easy to see that this rule is not, and never could be, defended in argumentation. To do so would in fact have to presuppose the validity of precisely its opposite, i.e., the aforementioned principle of nonaggression. - Hans-Hermann Hoppe, "A Theory of Socialism and Capitalism"