Probably more correct to say that: "A group never admits they are wrong about the core identifying belief that defines the group" Groups admit being wrong abou

Probably more correct to say that: "A group never admits they are wrong about the core identifying belief that defines the group" Groups admit being wrong about non-core beliefs all of the time. But of course if you look at the core belief that actually categorizes whether you are in the group or not, then it cannot admit being wrong or else it ceases to exist. Having said that, I think the author is really making a silly point to say that a group defined by a core belief CANNOT admit that its core belief is wrong. Kind of obvious when expanded to its more verbose form.