Liberty magazine published a bunch of articles on argumentation ethics. Here’s the link to this very good discussion which starts on page 40, Gordon’s article is on the end of page 46. Unfortunately he doesn’t critique it. But I found the article very helpful.
http://www.libertyunbound.com/sites/files/printarchive/Liberty_Magazine_November_1988.pdf
AAAAAA.... it's your friend in Texas from that one place on the internet over there.
You know, that place...