I'm sorry that it appears that I'm deleting all your work, but you copied this straight from http://www.utm.edu/research/iep/e/encylop.htm. This is not allowed because of copyright violations.
Hmm, I may have read that page (I read a lot), and I went to see the link. You were right, two sentences had several verbs and nouns in common, so I've put it down with my own words.