Hacking tests is a lesson much older than modern schools. It's a fundamental part of being human, or indeed, an animal. When a peacock is being judged for his

Hacking tests is a lesson much older than modern schools. It's a fundamental part of being human, or indeed, an animal. When a peacock is being judged for his feathers or song or mating dance, these are all being used as proxies for the actually important thing, the quality of his genes. And it's not just a male thing; women do all kinds of work to appeal to arbitrary male preferences. On the other hand, survival of the fittest is an honest judge, so maybe these peacock tests work better than we think?