The paper’s abstract may answer your question. (see link above)
In fact, I think you will find it is exceptionally clear writing. I think almost anyone can understand the differences and what is alter even with a quick read.
After reading the abstract and intro, I personally have more questions than when I started!
In fact, I think you will find it is exceptionally clear writing. I think almost anyone can understand the differences and what is alter even with a quick read.