I call bullshit, like yeah I'm sure that's the smallest degree or whatever, but how 'hot' or 'cold' something feels is up to way more than just temperature like humidity, wind chill if it's sunny or cloudy so in a real example I doubt a person can notice the difference between a 66°F and 65°F day because there's so many other factors. And you know what it is actually really bad at? Telling people when stuff freezes, you think some person from texas or nevada or any place that usually doesn't get cold enough knows the exact freezing point in fahrenheit? Most people will guess around 30 while pretty much everyone knows that the freezing point of water in celsius is 0°