One of them (Dunning or Kruger, can’t recall) was interviewed on the You Are Not So Smart podcast. Look it up.

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I’m going to answer the broader topic: “how do I know what mastery I have in a subject area?”

• Are you able to use parts of a problem in that area to fill in the gaps from experience to find a solution?

• Are you able to identify why an attempted solution to a problem in that area won’t work, and why?

• Do people refer to you with difficult questions about that area?

• Are there areas in that subject you feel don’t make complete sense, that when you ask subject matter experts they deflect (or better, admit they don’t understand it either)?

• Can you identify problems in that subject area that have not been solved, and can, if not take the time to solve them, identify how you would go about solving them?

Each step here shows an increasing level of mastery in a topic.

The effect seems intuitive, however the dunning Krueger effect has been disproven. It is not an accurate theory.

Depending on the actual thing you're considering, it's putting the knowledge into practice and having a clear way of evaluating whether you're failing

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