From The Believer in 2013, after the release of her album Metals.
I had a lot of not-as-good titles, but there’s no clarity about a title until the very end. Metals. It was like how I chose Big Sur. I knew what the songs were about and who I was going to be working with. Gonzales and Mocky being the kingpins, my brothers-inarms, old witnesses, and I knew the expansion was going to happen. “The Bad in Each Other” was going to be a war cry. I was talking to the guys and I was like, “This has to be like they’re coming – there’s an army bigger than you’ve ever seen that is about to come over the rise of the hill, and you’re in your fortress, and you’re playing, and someone’s going [makes a trumpet noise] because they’re harking to call their brothers out to fight for their lives. It has to be that sense of massive life or death.”
Emphasis mine. And that song, “The Bad in Each Other,” is a war cry.