Only if you agree it is "redistributing" anything! Small enough pieces of code can't be copyrighted. No one would support an argument that I violated copyright

Only if you agree it is "redistributing" anything! Small enough pieces of code can't be copyrighted. No one would support an argument that I violated copyright by using the code "else if {" from some GPL library. So the question becomes what is the minimal unit of copyrightable code? What if you wrote a nice big function exactly (or almost exactly) the same way as someone else did? Whose copyright are you violating?