> the value Peter Norvig is trying to provide is making readers understand the principles, he's not trying to provide some monetary value I think he's trying t

> the value Peter Norvig is trying to provide is making readers understand the principles, he's not trying to provide some monetary value I think he's trying to show how to approach solving this kind of problem. Juniors will copy it, and will then write tests in a business-logic environment which have dubious value. The code shows how to solve the problem very well. The tests do not.