Abstraction levels in engineering are like octaves for vocalists. I think I know maybe 2-3 engineers with a range greater than 3 levels/octaves. Mine is not even 1 full level/octave 
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Replying to @johanatan
Familiarity and college level exam passing aren’t the same as practicing mastery at even a mediocre level. They just mitigate anxiety
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Replying to @johanatan
Doesn’t work that way from what I’ve seen. People are comfortable enough to technically discuss things with people at other home levels but not actually practice more than 2 levels away. Small differences overwhelm conceptual similarities. Skill decays to dangerously amateurish.
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Replying to @johanatan
I think you’re vastly overestimating the number and or capabilities of these supposed “true masters”. If anything I think I know far more of them than usual, which throws the average/median engineer’s limited range into sharp relief.
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Consider that you may have preferentially sought out and chosen to work with top talent and may yourself be good enough that they want to. The industry average is nothing like the cream.
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