This is quite useful, I constantly have to cut back on the self-discounting. After years of schooling really focusing on human factors, it can be difficult to translate the lessons I've learned into terms that are authoritative with a different audience.
Another beautiful example of impostor syndrome comes from Neil Gaiman:
Some years ago, I was lucky enough invited to a gathering of great and good people: artists and scientists, writers and discoverers of things. And I felt that at any moment they would realise that I didn’t qualify to be there, among these people who had really done things.
On my second or third night there, I was standing at the back of the hall, while a musical entertainment happened, and I started talking to a very nice, polite, elderly gentleman about several things, including our shared first name. And then he pointed to the hall of people, and said words to the effect of, “I just look at all these people, and I think, what the heck am I doing here? They’ve made amazing things. I just went where I was sent.”
And I said, “Yes. But you were the first man on the moon. I think that counts for something.”