The demographic of this site alone should show you why the majority of members lack simple sense when it comes to arguing. The extent of their intellect stop at downloading and extracting a .rar and running an .exe. Not exactly skills one can use in an argument.
But I do believe that anyone here in General can argue to a degree. It just depends whether or not they have knowledge of the topic. I will argue with someone about PC hardware, cars and modern culture, but I wouldn't dare argue with someone about coding or even software in general, and I wouldn't argue with someone with an in depth knowledge of religious history. Some people just feel they are required to argue about something they have no knowledge in, even if it inevitably becomes a verbal pissing contest.
This being general, you would expect some people to have a little general knowledge
I know for a fact that quite a few people here can't even form a coherent sentence