“One attribute associated with human intelligence is language, which, when defined as the use of sign sequences within a complex grammar, appears to be uniquely human. What’s interesting about language — at least from a neuroscientist’s perspective — is that it resides on only one side of the brain (the left side in most right-handers). What makes it mind-boggling is that the two sides of a human brain appear nearly identical in both large- and small-scale organization. In other words, there appears to be no physical difference between the two halves. Neuroscientists know of no circuit or structure or cell unique to the left side of the brain that would explain its language capacity compared to the lack of it on the right side. Yet, as seen in patients whose left and right brain halves have been disconnected for medical reasons, the left side is capable of carrying on a conversation about recent experience, but the right side is not.”