Had I read the argument from someone else at an earlier date, I'd probably use an argument-from-difference like you are. Such a scenario is more than logically possible- I might have actually considered the problem in the past. I have no doubt that the person who had once disagreed with OI is me.
Do you want to take this to PM, if only to save on your karma?
Nah I've pretty much lost interest. Sorry. I don't particularly care about my karma except as evidence on average. The troll toll doesn't bother me. This issue is a lot less important to me because I'm not coming from a position of believing I'm the most important thing.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.