op-ed: Why conspiracy theories die hard

I have a new commentary on about the release of President Obama's birth certificate yesterday and why it's a victory for misinformation. Here's how it begins:

Recent polls have found that as much as 15% to 20% of the public, including about 30% to 45% of Republicans, falsely believe that President Barack Obama was not born in this country. Will Wednesday's release of Obama's long-form birth certificate put an end to the birther myth?