Intelligent Design

[AAA]

Do we have to eliminate every possibility except design before we can accept a designer to account for the design?

Try this:  
"Do we have to eliminate every possibility except design before we can accept a designer to account for the way things are constituted?"

The answer then is clearly yes, just as it is for the way you answered it .. but less confusing for having chosen a less prejudiced way to express "the way things are constituted".

Yeah, but even the atheist/evolutionist agrees that things have a designed. They just disagree on if that design arose by undirected natural processes, or by an actual intelligence. The say the former.