To best understand this first you have to take a look at how primates learn. When primates are born only 20% of our brains are hard wired up. The rest is made up of millions of separate cells waiting for the baby to learn before they join themselves together. This is not the case with the rest of the mammal kingdom (except for elephants). where 80% of the brain is hardwired at birth. This is why kittens and puppies can learn to be cats and dogs so quickly.