How does the engineering of concepts impact how we think about them? We sit down with Bojin Zhu to discuss what makes a concept, how concepts change over time, and what it means to build a methodology for understanding conceptual change. We chat about the intersection of the value and meaning of concepts with their pragmatic and societal implications. Our conversations spans concepts like liberty (whether it's a useful term), free will (what to make of it), truth (whether it exists), and pain (and how to understand our experience of it).