It’s understandable if you who haven’t jumped on the Twitter bandwagon, but please know that it’s good for one thing. The conversational, off-the-cuff nature of medium is very good at exposing the limits of one’s knowledge. Case in point: Here’s Daily Kos founder Markos Moulitsas reacting to Rick Santorum’s speech tonight. Apparently some truths aren’t as self-evident as they once were:

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