After reading through a few columns and comments, researchers have discovered the tripartite deep structure (to use Noam Chomsky's phrase) of the liberal brain. Liberals are famous for their psychological studies showing that liberals are better than conservatives. Here's why: the liberal brain is composed of these three areas and structures:
The Lawyer, The Schoolmarm and the Mommy.
Sometimes only one part is needed and functioning, other times two of them hook up and sometimes, if you're lucky, they all fire at once.
Really, how much better than that could you get?