This concept is so central and core to the company, that it offered cash to random math geeks who might help them improve their formula.

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There was something to that argument: credit is a learned thing, both a legal concept and a social one that emerged in the developed world over centuries, whose core component is the creation of a sense of obligation between two perfect strangers.

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Game developers are pushing the very concept of portable gaming on tablets and smartphones at a breakneck rate thanks to quad-core processors such as NVIDIA's Tegra 3.

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