Similarly, if you want to avoid threatening someone else, keep your eyes lowered and your head down.

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And so this line captures the character of Nucky Thompson, it echoes a truth that Nucky realizes about himself when at the end of season two he kills someone who has been threatening his business.

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If someone tries to blackmail a software company by threatening to expose a bug then let them sue, but saying that full details can only be given to trusted insiders is surely not acceptable.

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