BoulderHead
An interesting formulation of natural rights was discussed in an ethics class I took a while back. I can't remember who made the argument, but it was made that any individual has the right to do whatever he wants with his person or property so long as he does not infringe upon the liberty of others to do what they want with their person of property. This is common, but the interesting part was that he included any act that permanently restricts one's own liberty (such as suicide or selling oneself into slavery) as an act one does not have the right to commit, the argument being that you cannot ever change your mind.
The problem occurs between the two boldface segments wherein restriction is first strictly limited to others, yet in the second part restriction is placed on self. There is exclusivity between others and self which makes holding both of those viewpoints simultaneously a fair example of doublethink.