Argumentative Essay--Ghosts, again

As a topic of my argumentative essay, I'll again choose ghosts--it's existence. In my essay with quotation, I compared three points: EVP, life of Thomas Edison, and automatic writing. Although the length of my essay was quite long, I could not still include all the details I found--because of the length. So in my argumentative essay, I'd like to write about the existence of ghosts again. Actually, I think the topic is not so great for my mental health, I'll try again. Some sources I used are below:

EVP:

• http://en.wikipedia.org/wiki/Electronic_voice_phenomena
• http://www.rense.com/general33/evpcase.htm (this is a content of conversation with ghosts by means of EVP, and is a clue of solving a crime)
• http://news.bbc.co.uk/2/hi/uk_news/scotland/4152805.stm

Thomas Edison:

• http://www.ghost-science.co.uk/2010/08/thomas-edisons-life-units/
• http://www.prairieghosts.com/oh-milan.html

Automatic Writing:

• http://en.wikipedia.org/wiki/Automatic_writing
• http://www.ksjs.or.kr/tt/board/ttboard.cgi?act=read&db=colinsa2&page=1&idx=21 (sorry, this article is written in Korean)

Existence of Ghosts: True or False

Supernatural beings, it is probably a theme which makes most of people interesting. Supernatural phenomenons seem so realistic, but it is hard to experience such events in our ordinary life; and this might be the reason why stories about supernatural phenomenon intrigue us so strongly. In this essay, I'd like to choose a ghost as a topic. Since it is hard to prove the existence of ghosts in scientific approach--but there are so many evidences of existence of ghosts and witnesses of ghosts in the world--the existence of ghost is still controversial. I'll introduce both sides on this theme--who believe ghosts and who do not--in this essay. The sources I'll quote are below:

http://en.wikipedia.org/wiki/Ghost
: definition of ghost, and general information on ghosts

http://paranormal.about.com/od/ghostaudiovideo/a/edison-ghost-machine.htm
: Thomas Edison, the great inventor, also studied about ghosts and made a machine which allows communication with ghosts

http://science.howstuffworks.com/science-vs-myth/afterlife/ghost3.htm
: Scientific explanations on "seeing ghosts"