Considering some of the things climate-change deniers argue or repeat, I doubt this chatbot will make a lot of difference to people that willfully ignore credible evidence while making claims that seem superficial or blatantly false.
Tired of responding to climate change deniers on Twitter, this man created @AI_AGW, a bot that responds for him http://j.mp/b9HfV7—
Stephen Miller (@miller_stephen) November 05, 2010