So when my neighbors mother from another climate came to visit during the summer, I was wearing shorts and t-shirts but she a winter jacket. According to whos experience did Fahrenheit match the human experience? It’s very variable and cannot be made to fit everyone. That water freezes at 0 is just as arbitrary but at least it’s an experience/observation anyone can share. If it’s 0°C outside puddles will freeze. Is it warmer or colder than when ice and snow melts is as good a reference as any, and to me having grown up with it, it feels superior because it’s what I’m used to.