Which, I’m sure you realize, is an entirely different thing than saying they were invited to THIS debate and refused to come.
Perry/Romney were asked to do a separate one-on-one debate. I don’t see the point of Romney and Perry doing their own debate, especially when it isn’t really a debate. I’d watch it I guess, but I’d much rather see each candidate spend an hour with a questioner, but given plenty of time to talk about what they want, than watch Romney debate one-on-one with anybody.
Fortunately, many of us - including you - are interested in watching Cain/Gingrich debate. I see your point about Romeny/Perry, though.