It's a shame that saying "I don't know" isn't as culturally acceptable in many orgs. Technology is incredibly vast and entirely designed by humans, more people than you could ever imagine in the enterprise actually have no idea what they are doing.

Whenever I have casual conversations with individuals that have the same skillset as me, outside of the environment where I wear my professional "all knowing" persona - Admitting that you don't understand something sparks incredible conversations.

What's even more incredible, is that every time I've stood up and said "I actually have no idea how X works. It is magic to me." Every single time somebody else in the room that had me completely convinced they had a strong grasp on those concepts will also admit they don't know either.

These answers are also my red flags. But I place more blame on culture than the individual sometimes.