[leoedin]

It does narrow it down, but not to any useful level. For all intents and purposes, trying to pick someone from a pool of 150 million vs 7 billion is essentially the same level of impossible.

[daeken]

Really interesting article on using information theory to narrow down suspects of crime: http://www.gwern.net/Death%20Note%20Anonymity

[leoedin]

That is pretty interesting. The wikipedia edit time example is particularly revealing. The AC hum stuff is truly fascinating!