> it is, but the 2nd order logic says that if they are trying to cast doubt, it means they've got nothing better to offer and casting doubt is the only step the

> it is, but the 2nd order logic says that if they are trying to cast doubt, it means they've got nothing better to offer and casting doubt is the only step they have. I don't think that this is a working argument, because all their steps I can imagine are not mutually exclusive.