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Old 08 February 2012, 08:43 AM
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Em Em is offline
 
Join Date: 11 July 2005
Location: Perth, Western Australia
Posts: 2,976
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Why doesn't the explanation make sense?

Think of the contacts in your phone. You can look someone up by name or you can type in their number and it'll display the name. That sounds like what's going on here, only with unique IDs rather than phone numbers.
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