a really great article having to do with the possibility that certainty - our feeling of conviction - is a brain-generated reward mechanism unrelated to reasoning and logic.
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We all seem convinced we're right about politics, religion or science these days. What makes us so sure of ourselves?

By Robert Burton

Certainty is everywhere. Fundamentalism is in full bloom. Legions of authorities cloaked in total conviction tell us why we should invade country X, ban "The Adventures of Huckleberry Finn" in schools, eat stewed tomatoes, how much brain damage is necessary to justify a plea of diminished capacity, the precise moment when a sperm and an egg must be treated as a human being, and why the stock market will revert to historical returns. A public change of mind is national news.

But why? Is this simply a matter of stubbornness, arrogance or misguided thinking, or is the problem more deeply rooted in brain biology? Since my early days in neurology training, I have been puzzled by this most basic of cognitive problems: What does it mean to be convinced? This question might sound foolish. You study the evidence, weigh the pros and cons, and make a decision. If the evidence is strong enough, you are convinced there is no other reasonable answer. Your resulting sense of certainty feels like the only logical and justifiable conclusion to a conscious and deliberate line of reasoning.

But modern biology is pointing in a different direction. It is telling us that despite how certainty feels, it is neither a conscious choice nor even a thought process. Certainty and similar states of "knowing what we know" arise out of primary brain mechanisms that, like love or anger, function independently of rationality or reason. Feeling correct or certain isn't a deliberate conclusion or conscious choice. It is a mental sensation that happens to us.

The importance of being aware that certainty has involuntary neurological roots cannot be overstated.


www.salon.com/mwt/mind_re...y/index.html