That’s fine right up to when you’re complaining about the temperature to an american.

But I am an American. To learn Celsius I came up with a quick heuristic to do “accurate enough” conversions for the months between switching off Fahrenheit and getting to the point where I knew Celsius well enough.

So I can pretty quickly go from Celsius to Fahrenheit for my ignorant compatriots.

Edit: For anyone downvoting me, if it’s because I called people who don’t know Celsius “ignorant,” please understand I’m using this definition: “lacking knowledge, information, or awareness about a particular thing.”

Not this one: “lacking knowledge or awareness in general; uneducated or unsophisticated,” nor this one: “discourteous or rude.”

We are all ignorant about things we don’t know about. No shame in ignorance, it’s the default state of all living beings!