I guess I feel anything can be learned. But in your original context, I don’t think the ability to validate oneself is entirely internal. Some people may be naturally self-confident, but most of us aren’t—we get that way through circumstances and training ourselves.

For instance, I’m not a natural linguist. I don’t have a good basic feel for how languages work. It’s only through decades of training and hard work that I can claim to be anything of an expert on the languages I know.