What would the end result be if hypothetically, a mentally retarded person...?

There are two lines of evidence. One is Fraunhoffer lines of emission and absorbtion of specific light frequencies that are characteristic of particular elements. If you saw the characteristic Fraunhoffer spectral pattern for Oxygen in the laboratory, and then saw it again in the spectrum of a distant star, you could conclude that that star contained some Oxygen, couldn't you?

The second line of evidence comes from cosmic rays, which are high speed, high energy atomic nuclei that are thought to come to Earth from literally all over the Universe at large. They are composed of ordinary matter, such as Helium, Carbon, Iron nuclei, and the like. So we are able to sample the matter of the Universe directly as it comes to us from enormous distances.

Cheers.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.