It's not proof of any kind, or data really, but I recall my mother talking about that when I was really little. She said that we all had numbers issued by the government, but that the government made it clear that they were not to be used for identification. I know it sounds silly, but I remember her talking about it. It was supposed to be a 'private number that connected you to the social security program only'. Ahhh - yes, gullible as always. I even remember thinking that it was odd that I had to use my SS# in college as id for test results, because my mother had told me it was not for identification! LOL - little did I know how naive my mother and I were.