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Anonymity is derived from the Greek word ανωνυμία, meaning without a name or name-less, and more originally meaning without law. In colloquial use, the term typically refers to a person, and often means that the personal identity, or personally identifiable information of that person is not known.

More strictly, and in reference to an arbitrary element (e.g. a human, an object, a computer), within a well-defined set (called the "anonymity set"), "anonymity" of that element refers to the property of that element of not being identifiable within this set. If it is not identifiable, then the element is said to be "anonymous".

An example: Suppose that only Alice, Bob, and Carol have the keys to a bank safe and that, one day, the contents of the safe are missing (without the lock being violated). Without any additional information, we do not know for sure whether it was Alice, Bob or Carol that opened the safe; the perpetrator remains anonymous. In particular, each of the elements in {Alice, Bob, Carol} has a 1/3 chance of being the perpetrator. However, as long as none of them has been identified as being the perpetrator with 100% certaintly, we can say that the perpetrator remains anonymous.

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If you know someone abusing substances, please attend Al-Anon or Families Anonymous mtgs. to learn how to help you and them.
1davidn (David Niklaus) Sun, 20 Dec 2009 18:26:04 -0000
If you know someone abusing substances, please attend Al-Anon or Families Anonymous mtgs. to learn how to help you and them.
On our way home yay!! n we're feeling pretty good about ourselves. Did a few anonymous drop offs to some families... http://bit.ly/6WnEnR
SteveAmosa (Steve Amosa) Sat, 19 Dec 2009 05:31:31 -0000
On our way home yay!! n we're feeling pretty good about ourselves. Did a few anonymous drop offs to some families... http://bit.ly/6WnEnR
Anonymous Iran: "For families and friends of rape survivors" - http://tinyurl.com/mswxyg - #iranelecton #iran
seaofliberty (seaofliberty) Thu, 17 Dec 2009 19:33:52 -0000
Anonymous Iran: "For families and friends of rape survivors" - http://tinyurl.com/mswxyg - #iranelecton #iran
Anonymous Iran: "For families and friends of rape survivors" - http://tinyurl.com/mswxyg - #iranelecton #iran
seaofliberty (seaofliberty) Wed, 16 Dec 2009 01:01:24 -0000
Anonymous Iran: "For families and friends of rape survivors" - http://tinyurl.com/mswxyg - #iranelecton #iran
Friends are God's way of apologizing to us for our families- Anonymous
dazzler926 (Dazz Fajardo) Tue, 15 Dec 2009 00:03:40 -0000
Friends are God's way of apologizing to us for our families- Anonymous
Anonymous Iran: "For families and friends of rape survivors" - http://tinyurl.com/mswxyg - #iranelecton #iran
seaofliberty (seaofliberty) Mon, 14 Dec 2009 18:24:28 -0000
Anonymous Iran: "For families and friends of rape survivors" - http://tinyurl.com/mswxyg - #iranelecton #iran

 
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Families Anonymous - Families Anonymous' World Service Office official site includes information about FA's 12-step program; also provides on-line support group meeting directories; literature catalog; links to other support and contact information.

Families Anonymous UK - Support for families and friends concerned about drug abuse or related behavioural problems.
Meta Description: [ Support for families and friends concerned about drug abuse or related behavioural problems ]

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