I cannot clearly remember whether the question has been asked in this forum, but it certainly has been debated elsewhere. I for one have engaged in the discussion and you might find some helpful material at these addresses:

http://abob.libs.uga.edu/bobk/ccc/ce120600.html 

http://abob.libs.uga.edu/bobk/ccc/ce020200.html 

http://abob.libs.uga.edu/bobk/ccc/ce121300.html

http://abob.libs.uga.edu/bobk/ccc/cc032700.html

Unfortunately a full discussion would be, I think, excessive for this forum. But if you are left with questions qfter reading that lot, let's hear them.