• Mastery (aka specific knowledge, skill): theory + practice
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• ‣ (wisdom): good judgement, see ‣.
• Lifelong learning (‣, ‣, ‣)
• ‣ and ‣

Related:

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• Positive-sum games to play within an organisation
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• Components of engineer's seniority
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References

‣ In the world of limitless leverage, judgement becomes the most important skill. Everything else that you do is setting you up to apply your judgement.