I had the same thought. Maybe it's not that there were only white people in the dataset, but it's actually taking the shape of the face into account, and it mos

I had the same thought. Maybe it's not that there were only white people in the dataset, but it's actually taking the shape of the face into account, and it most closely matches those with white skin tones. I suggest this by looking at the cat one: it has the stripes coming off the eyes, so suggests one of the grey striped breeds rather than, e.g. all black or calico. It's probably more than pixel-by-pixel NN interpolation, but also taking into account some of the actual structure of the edges.