BTS, personal property can only be defined by social contract: law. It is all a concept, be it tangible or intangible. The idea of ownership is also a concept. So that said, property is whatever the law defines it to be. Can someone own a tree? Only if the concept exists in the social contract. So your argument falls flat. Law defines property, and law has defined intellectual property. Just because you don't like that part of the constitution does not change the fact that property is defined by law.
I'll shorten that for you.
"So and so is so and so because the law and the social contract (WTF is that, really?) says so, end of story."
That is an intellectual cop out.
170 years ago NewChapter would have defended the law and the social contract as proof that humans were property too. The institution had existed since the beginning of recorded history, after all. That is quite a "social contract." It was allowed in the Constitution and other laws as well, so it was defined by law.