At times I watch the news and see they talkin' 'bout diplomacy
And they ain't got a clue my niggas ain't got they diplomas, see

from J. Cole – Cole World Lyrics on Rap Genius

Meaning

Diplomacy is negotiating, and in the news, “diplomacy” is usually used in the context of foreign affairs, so Cole is saying the government worries about other nations, when we have kids who aren’t even getting their diplomas here in the U.S.

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