Jason, the rules don't actually say that at all: "Also note that links to sources are not required, especially if it's a simple answer." Assuming the answer is entirely your own work, you only need a source if you need to verify legitimacy.
But you're right though, this answer basically plagiarises a guide that was posted on a news site. I'm going to edit it now so it does not do this. So that it's very clear to everyone: do not copy and paste others' work and pass it off as your own like this answer did. Doing this is actually illegal, and very unfair besides.
Flags cleared for now.