The Half and Half Test

So here is an interesting test I would love to try on people. So imagine this.

Me: (putting on the table a special concoction fruit that is split down the middle and is half apple and half orange) So is this an apple or an orange?

Average Person: Neither. It is half apple and half orange.

Me: (putting on the table a block that is split down the middle and is half wood and half plastic) So is this a block of wood or is it a block of plastic?

Average Person: Neither. It is half and half so it can't be just one.

Me: (pulling out a sheet of paper and two bowls with paint in them, one blue and one yellow) When I combine these two colors, will the combination be yellow or will it be blue?

Average Person: Come on, every kid knows together they would combine to make a different color, green. So it would be neither blue nor yellow anymore.

Me: (pulling out the last items, a picture of a white woman and a black man and also a picture of their biological child) Half black and half white, is the child white or black?

Average Person: Don't be silly. The child is black.

You see what I mean?