The Problem of UFO Artefacts, Parts 1-3

This is a lengthy post about UFO artefacts. 
Because of its length, I have split the post into three parts.

The links to all of them in order:

http://uforum.blogspot.com/2018/09/the-problem-of-ufo-artefacts-part-1.html
http://uforum.blogspot.com/2018/09/the-problem-of-ufo-artefacts-part-2.html
http://uforum.blogspot.com/2018/09/the-problem-of-ufo-artefacts-part-3.html