A couple of days ago, the U.K.-based YA author Melinda Salisbury wrote online: "Every time I write a character frowning now, I remember Americans think this is something you do with your mouth, and it ruins it." Soon after, I, a British person, logged into Slack to find my American Slate colleagues discussing this tweet. I read the conversation, and frowned. By which I mean I furrowed my brow, looking confusedly at the screen. Because that is what a frown is.

In a March 21 Slatest, Mark Joseph Stern misstated that the April 2019 Wisconsin Supreme Court election could give Democratic justices a majority. That opportunity will not arise until the 2020 election. Due to an editing error, a March 20 Future Tense Newsletter incorrectly stated that the National Institute of Standards and Technology has been using nonconsensually obtained images to train its Facial Recognition Verification Testing program. The NIST does not develop or train facial recognition systems. It provides independent government evaluations of prototype face recognition technologies.