It’s the best way to think about it because if you’re always doing the calculation in your head you still always think in Fahrenheit first. Just get the feeling for Celcius instead of trying to shoehorn a worse system in (as a user of said worse system myself).

At least in the US, the police found that the chances that a drug dog actually finds drugs is about 50/50. Which are not odds they like when it means they have to get a warrant, do the minimum amount of explaining to a judge, and do their job for once. So they found it was easier to train drug dogs to respond to signals and jump at a car on small signals or command. That way they jump on the cops suspicion and their 50% turns to 100%. If they find drugs then great, the dog let them bypass the warrantt and true due process. If not, then you have no recourse for action. Drug sniffing dogs for your local middle of nowhere PD are a joke.