I'm skeptical of the ability of algorithms to detect subtle things like that. Maybe actual sociopaths would be tested.

But I'd like to point out that fact checking algorithms aren't that hard, and might already exist. Watson was used to fact check political debates a few years ago.

It's also pretty easy to keyword match any argument, and pull up a highly voted reddit comment in reply. I made an IRC chatbot like this that was very fun. I believe in the near future you will see a lot of stuff like that.