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It's been a week since the U.S. government blamed North Korea for the cyber-attack against Sony Pictures Entertainment -- and many security experts still aren't convinced Kim Jong-un is the culprit.
The FBI's announcement, rather than settling the debate, has only fueled widespread speculation over the source of the attack.
Skeptics claim the evidence the FBI cited is flimsy and inconclusive. They question whether Pyongyang really had the motive, or the ability, to scramble Sony's systems.
And they're p