There's a study making the news of late (NYT June 14, 2011) about how we bring others around to our way of thinking and it's getting some coverage due to the assertion that we, as humans, are inclined to put forth biased arguments, rather than reasoned ones, to make our case.
What I found of particular interest were the observations of Darcia Narvaez, an associate professor of psychology at the University of Notre Dame, who observes how reasoning has developed:
“...reasoning is something that develops from experience; it’s a subset of what we really know.” And much of what we know cannot be put into words, she explained, pointing out that language evolved relatively late in human development.
“The way we use our minds to navigate the social and general worlds involves a lot of things that are implicit, not explainable,” she said.
This is also an excellent description of how an artist navigates the world...