The Guardian – Matthew Youlden 
Imagine I gave you a book full of words, numbers and strange symbols – 150-odd pages of the stuff. Some of the things relate to each other in obvious ways, others not so much. Now suppose I’m going to test you: 50 questions about the contents of that book, how do you think you’d do? Well, if you can drive a car, chances are you’ve already done very well: those of you who passed the theory test recently will have got at least 43 out of 50 questions correct. That’s just one everyday example of the average person’s capacity to learn something that appears complex at first. Despite recently making the questions tougher, the DVLA still reports that the test has a pass rate above 50%.(more)