Wilson as Comedy?

This link is interesting because its a synopsis of an article that argues for the labeling of "Fences" as a comedy, not a tragedy. I thought this was interesting because I would have never considered labeling this play as a comedy. Troy and his relationship with his son is tragic to me, and his ignorance is not amusing, but sad. Wessling, the article's orginal author, states that Gabriel is nessacary for this to be considered an comedy. He is the central figure to pulling this play together, since he represents the forward looking Christian values that are essential to make "Fences" a play of hope, not tragedy.

http://www.123helpme.com/view.asp?id=5295