Much better than I had anticipated -- great job. :-) I was poised to retort with the following:

My contention is that "rights" are in reality little more than opinions. However, they possess two essential characteristics: 1.) They must be something that at least a significant portion of the population recognizes as such, and; 2.) they must be things that you have a reasonable chance of defending or restoring, in the event they are abrogated, by either peaceful and/or violent means.

Think about it: If you were alone in the world, would you have "rights?" The entire concept becomes superfluous. We only entertain the idea of "rights" once other humans come into the picture. This pretty much deep-sixes the idea of stand-alone concrete "rights" that don't depend upon outside human approval. Any contention to the contrary, again, is instantly reduceable to mere opinion.