Once you come up with a premise, you have to work out how it all happened. It's a bit like coming up with a spectacular roof design first. Before you can get it up there, you need to build a solid foundation and supporting structure.
A debate has one purpose, one purpose only, and that is to facilitate the exchange of ideas directly between two candidates, and that's it.
I started my career at the top and have been working my way downwards ever since.