During today's Glenn Beck radio show Sarah had to be corrected by the host on the current hostilities between the two Koreas.

CO-HOST: How would you handle a situation like the one that just developed in North Korea? [...]

PALIN: But obviously, we’ve got to stand with our North Korean allies. We’re bound to by treaty –

CO-HOST: South Korean.

PALIN: Eh, Yeah. And we’re also bound by prudence to stand with our South Korean allies, yes.

A slip of the tongue? Maybe, maybe not. But in John Heilemann & Mark Halperin's Game Change there was this telling point which suggests otherwise.

She knew nothing. She had to be taken through World War I, World War II, the Cold War, and Palin was not aware there was a difference between North and South Korea. She continued to insist that Iraq was behind 9/11; and when her son was being sent off to Iraq, she couldn’t describe who we were fighting.