Subduction Zone
Veteran Member
As to debating the structure of the debate should be set up before hand and anything in that structure should be allowed.
As to phone in's, It is best practice to admit you have no knowledge on the subject they bring up and then return to the debate structure. A debate can always be done on the new subject in the future with people who actually have the knowledge necessary.
I have seen Matt Dillahunty (stupid spell check telling me I spelled Dillahunty wrong now where was I? Oh yeah) ask as a starter "What do you believe and why?" and for some reason that can be the hardest thing for a theist to express. Maybe because when they try to put it into words they realize how flawed their reasoning is? I really cannot say for sure when it comes to that question.