-In working on a free software package, DO NOT study and follow any
-non-free source code that might have any bearing on the project.
-Don't refer to non-free source code at all, unless you are forced to
-for non-GNU reasons.
-
-Especially, if you are working on a replacement for a particular
-non-free program, DO NOT refer to the source for that program
-(supposing you have it).
-
-It is not considered a serious problem if you have read non-free
-source code in the past for other purposes, provided you don't copy
-anything in particular from it. But referring to it while you do the
-work could cause legal problems later for the users of your work.
+In working on a project for GNU, DO NOT study and follow any Unix
+sources or other non-free software that might have any bearing on the
+project. Don't refer to them at all, unless you are forced to for
+non-GNU reasons.