The Milk Test
If, despite your eyes, you still believe that there are white people, then consider this scenario:
David Duke, former Grand Wizard of the Ku Klux Klan, is told that there are two glasses in the room next door; that he may drink what he wishes, but he is warned that one of those glasses is full of milk, and the other is full of paint.
In the next room there are indeed two glasses with two liquids. In one glass, the liquid is the same color as snow. In the other glass, the liquid is the same color as David Duke.
From which glass would David Duke drink?
The snow-white glass, of course; that’s the one full of milk. The Duke-colored glass must be full of paint, not milk; and that’s because milk is white, and David Duke is not white.
What’s more, he knows that he isn’t white.
There are other versions of the milk test. For instance, if a cloud floated overhead, and it were the same color as you, and it dropped snow the same color as you, then would you go out and play in that you-colored snow? And maybe taste some of it? Or would you instead hide indoors, and call the EPA to report an environmental disaster?