Do you think left-brain and right-brain dominance is exclusive?

I have a writer friend who questions whether or not she ought to accept a rooommate who cannot punctuate a return email. As someone who lives with a man who can't spell to save his life, I'd bet on him in the math department against almost any of my writer friends.

Most of my enginerding buddies have difficulties in the spelling, grammar, and/or punctuation departments. It isn't about their intelligence – it's simply an emphasis on th