A Theory

Hey everybody who happens to be looking at this blog. I have a theory for writing novels. I was wondering what your opinions on Duel Authors are. I think that it might be easier for two people to work together on a book than working separate. They could encourage each other and swap ideas back and forth. That's my opinion. But what I want to know is what you guys think. Would Duel Authors be better than working alone? And why do you think that?