Unthinking is the ability to apply years of learning at the crucial moment by removing your thinking self from the equation. Its power is not confined to sport: actors and musicians know about it too, and are apt to say that their best work happens in a kind of trance. Thinking too much can kill not just physical performance but mental inspiration. Bob Dylan, wistfully recalling his youthful ability to write songs without even trying, described the making of “Like a Rolling Stone” as a “piece of vomit, 20 pages long”. It hasn’t stopped the song being voted the best of all time.