Apologies for the delay. Had a slew of loose ends with my book to deal with.
"Despite that Cogito has made a reasonable prima facie case that we are not the same person."
Reasonable based on what criteria? His case is based on making an assumption that two different screen names are two different people.
Your distinction that the objective evidence cannot be faked 'easily' does not go very far. At the very least, it would suggest that you know what is involved in faking such a thing, doesn't it? How would you know if its easy or hard if you haven't looked into it yourself? And if you haven't looked into it, why should we consider this point credible? And if you have looked into it, that suggests that you have some knowledge on how to pull it off.
"Moreover, you haven't even suggested a possible motive for a single individual to make such an effort on your board,"
That's not true. In the first place, you provided a motive all on your own. In the second place, I've offered a possible and 'plausible' motive at least
twice.
Hey, maybe if you repeat this assertion again it will be true. We'll have to find out.
"And your claim is quite implausible, given your lack of evidence"
Who says I don't have evidence?
"or even the suggestion of a possible motive."
Oops! There is the assertion again. Is it true this time? lol, nope.
As for 'motive' I don't think the goal is to keep anyone off balance. I think the goal is to farm the dirty work of blatant insults off to Cogito so that Cop can use his veiled insult approach. Indeed, you notice this sort of behavior in any thread where the two of them post- including this one and also the 'Time- Dawkins' thread, and others.
I think most English readers would consider this at least a 'suggestion' of possible motive.
"Again, it is not. Sock puppets are usually very easy to detect, because we all have fairly distinctive writing styles."
Yes, but an intelligent person, being aware of this, could deliberately work to counteract it. You are an intelligent person, and since you have pointed this out that shows that you are aware of this. In fact....
"People in my line of work--computational linguistics ..."
Ah yes. Not only are you intelligent, aware of the fact that distinctive writing styles exist among multiple personalities, but your specific LINE OF WORK is computational linguistics. Means. Motive. Opportunity. You've got the 'means' all locked up, don't you.

Now, it so happens that it is precisely computational linguistical analysis was what first prompted me to consider they hypothesis in the first place. Your posts are not as different as you might think.
"No, I wouldn't be comfortable with giving out my driver's license or social security number."
Actually, I realized a couple of hours later that this wouldn't resolve the matter, anyway.

"But I don't really think that you doubt seriously that we are two different people."
Oh? What about this:
"However, I now have doubts that sntjohnny himself actually realizes how silly he has been. He may actually believe that someone would bother to go to all the trouble to create two different sock puppets on his board just to give him grief."
Such vaccilations in your position makes it hard to try to present an argument. Arguments are molded in an attempt to respond to people's true positions. Yours appears to shift rapidly.

I will have to study harder on how to do that, myself. :)
"You are trying to make a point that you think will ultimately support jumping to the conclusion that your god exists."
Are you so sure? Perhaps if there is a point to be made it is that it will undermine arguments jumping to the conclusion that my god does not exist. Two different things.