As a subsequent owner, SCO cannot now undo a settlement entered into nine years ago by a previous owner. That's why they call them "settlements." They settle the issue.
"Precedents" are a red herring here. There is nothing to litigate. This issue was litigated, and settled, by large institutions with competent technical and legal advice. No judge will re-open it now; otherwise no 'settlement' would ever settle anything.
More rhetoric, at least you cut down on accompanied insults this time.
What in this settlement assures this code couldn't belong to ATT/SCO? It may be there, but so far your completely disorganized side hasn't been able to produce it despite repeated questioning, just rhetoric like above they gleaned from some blogboard.