perhaps they forgot to split a test set :) while I'm sure they already have a great dataset going back far, most of that dataset will be a small fragment of th

perhaps they forgot to split a test set :) while I'm sure they already have a great dataset going back far, most of that dataset will be a small fragment of the world that already had internet 10 years ago, in the mean time a lot of people in other parts of the world have come online and may have old pictures of themselves