untrained white eye

White peoples inability to tell the difference between individuals in the same race or similar race

Wasn't Nick Cannon in Friday Night Lights?

No that was Michael B. Jordon.

Oh, well aren't they the same person anyway?

Only to your untrained white eye. You also think all Asians come from China
True

Untrained Eye

A black eye, generally acquired when someone hasn't been trained properly on when to keep their mouth shut.

Jenny must have gotten drunk this weekend, I see she has the untrained eye today, you know how she gets when she drinks, always talkin' shit.