  This little optical illusion illustrates one of the foibles of human visual perception. I just generated that picture, so I can tell you with confidence that the picture is pure black and white; there are no grays existent in the picture. Yet, as you can see, in between the blocks (especially at the corners), it seems like there are gray spots in the white. Therefore, the human mind incorrectly assumes that there is gray, when in truth, the picture is black in white. As I was walking, I don't know why this just came up to me, but it did. I was wondering this: Just as this image points out one of the limitations of human visual perception, I am wondering. There are many topics in ethics, philosophy, etc. that people consider to be "gray areas. " However, what if things are more black and white than they seem?
Maybe in these issues, we distort the truth by our own imperfections. So, how do we find that objective, cold hard standard to measure what's black, and what's white? I'm not really sure what gray areas I have in mind, but I'm more thinking about just the concept of having gray areas in general. 
