I love this, rather uncommon, stance: He had learned just enough about every subject; he could go back and fill in the gaps later, when and if that was necessa

I love this, rather uncommon, stance: He had learned just enough about every subject; he could go back and fill in the gaps later, when and if that was necessary. The gaps in his knowledge were surprisingly large, but not detrimental to his work. In some ways, teaching and learning specific subjects very deeply may be a form of premature optimization.