Edit comments Feb 2012
This page in my opinion is for site administrators managing roles. It tended to talk about users, when it actually meant a role. Users only have certain capabilities-abilities based on their contextual role. I added some examples.
I will check to see where the documentation has user overides
I deleted the reset role to defaults because I could not see that on the "Define roles" menu tabs. It maybe elsewhere but I looked in site administration Permissions and did not see it. --chris collman 23:44, 25 February 2012 (WST)