I think you're confusing the term "social contract" with "oral contract." An oral contract will usually be superseded by a written contract, but saying a writte

I think you're confusing the term "social contract" with "oral contract." An oral contract will usually be superseded by a written contract, but saying a written contract supersedes a social contract seems like a category error. One determines your legal standing, the other determines your social standing, neither really supersedes the other.