[jennyp]

It's only a correlation. Maybe those people have a propensity to get a 'certainty squirt' in their brain--a biochemical cause of an emotional hindrance to skepticism, or to being able to accept ignorance. There is afterall an emotion associated with having gained an understanding of something. There is also an emotion associated with feeling ignorant. It is probably possible to feel the 'certainty' emotion, or inhibit the 'ignorance' emotion, biochemically and without reason.

I agree! I've thought since an early age that the most passionate belivers in God are so afraid of uncertainty that they create God to fill in all the holes in our understanding of the world. I, OTOH, have always been just comfortable enough with my ignorance to work patiently to find a good explanation for a difficult question instead of leaping at the first comforting platitude.

[beavus]

If it's true, you could potentially put 'certainty' in pill form. Then we'd almost never learn anything. But, at least we'd be confident.