1,000,000% this. If a senior engineer can’t explain it to you in a way you understand - even if you are a lot less experienced - that’s THEIR deficiency. Not yours. When this happens, it means THEY actually don’t understand it well enough.https://twitter.com/noahsussman/status/1170870234066165760 …
As a former 3- to 6-year-old teacher, I'll go with something I heard: "If you can't explain what you know to a five-year-old, you don't know it."