My 10-year-old homeschooled son says he has to argue with me because there isn't anyone else to practice his debate skills with.
Wikipedia has solved some disputes, but he likes to argue about moral and ethical and social kinds of things where what is right and what is wrong are debatable.
I am actually encouraging this. I don't know it all, even "experts" don't know it all, so I could be wrong occasionally. If my son thinks he can successfully argue his point, while being respectful, then great. I think this can turn out to be a good life skill.
He usually has to do some online research to back up his argument and he learns from it.
