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If anyone is in Boston get on of them totally smashed and get them to reveal all.
oops wanted to edit the badly spelled title but cannot :)
Perhaps this is what its like at Google, someone writes one part of the algo without knowing whos writing another, or even where/how/if it is going to be used. That way only teeny weeny bits of info can ever be revealed. Thus limiting any damage from leakages.
Only a select few will know the whole or even large parts of the algo.