Wow, that comment was absurdly ignorant. I mean that last sentence is just flat-out wrong reducto ad absurdum.
There were plenty of machines around back then that led people to contemplate the possibilities of artificial intelligence - there are many ponderous essays I've read from around that period theorizing such machines. Intelligence isn't something that can be accurately measured, that seems to be a divisive argument but that's where I stand on it. However, you can clearly define that which is intelligent and that which is not. Unless that rock is sentient, it isn't intelligent. It's just a solid mineral... I hope for your sake you were trolling.
Anybody else remember reading about this amazing machine? Granted it was operated via another human player and had no real AI, it was still a fantastic design (mechanically) and a precursor to the actual chess computers we have today. Interesting as well to note that quetions regarding the capacities of artificial intelligence were in question back in the 1700s.
http://www.atlasobscura.com/articles/object-of-intrigue-the-turk?utm_source=facebook.com&utm_medium=atlas-page