> When I met Johanna, far from there, in a university town, she made a deep and perplexing impression on me: the precision of her attention and the intensity of her curiosity were unlike anything I had seen, and yet, despite this, she was almost completely ignorant. If I mentioned the First World War, she would say, “When was that?” But if I explained an area I was researching, it would take her five minutes to cut through to the deep, underlying question that had eluded me for months.

Knowledge and intelligence are orthogonal concepts. It's important not to conflate them.