This describes your ability to become an expert in any tiny niche in a very short time. A few years a woman dazzled guests at a dinner party with her knowledge about Zulus it turned out that she had simply read an article in the Readers Digest the night before. Rather than mock this somebody who was listening realised that in today’s fast moving world it was an asset and a virtue to be able to become an instant expert. He was Jim Slater and he went on to apply this to choosing investments by specialising in particular types of shares and situations. In essence it is about finding a niche and exploiting it.