Your comparison between IP and contract enforcement is a complete non-sequitur.
Unfortunately, intellectual property is wholly incompatible with a free society. If you're actually interested in learning, you can start
here.
I am very familiar with Kinsella and other anti-IP libertarians. My impression, though, is that these have not answered a single of the arguments that I have presented in this thread.
The problem is that your arguments are incoherent. How can the ability to copy the text of a contract (without IP) possibly have any bearing on whether the contract is enforceable? This is utterly senseless.