What are you talking about peacegirl? People are discussing the premises...discussion does not automatically make Lessans wrong. Calm down.
Anyway rigorist, you can read the first two chapters and probably more
here
ETA: Arguendo means "for the sake of argument", he's assuming the premise is valid and sound "for the sake of argument" and then going into clarification of terms. Again, this is what a serious scholarly discussion looks like.