The Book of Daniel; Early (6th century BC) vs. Latter (2nd Century BC)

This is a debate which has been going on for a long time. I doubt there is a certain answer but rather then simply assume the earler date as the Lesson Study Guide does I would like to offer the two views for comparision.

So here is a internet debate upon the subject of the date of the writing of the book of Daniel. I wish it was simpler, but as with much of life it is not a simple matter.