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Old 09-01-2013, 10:11 PM   #79
Undertoad
Radical Centrist
 
Join Date: Jan 2001
Location: Cottage of Prussia
Posts: 31,423
I think the perfect shuffle is merely an entirely random shuffle. And that means there are going to be pairs and whatnot... because it's random. You shouldn't have the expectation of no pairs if it's more likely that pairs will happen.
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