[kergonath]

But then this is also valid if the zero is at 21°C. There is also nothing special at 0°F, it’s just the colour scale that makes it look like that. And if we based the scale on human perception we’d have to define many other parameters besides wind and humidity, like body shape and metabolism rate. It’s more of an argument against basing a temperature scale on human perception (and then I agree completely, which is why I find the centigrade scale much better, except for serious business that demands kelvins).

[bangkoksbest]

Yeah, it's not like Fahrenheit or any temperature scale is literally calibrated to human perception (they're all now defined as transformations from kelvin anyways), that's just a (minor) ancillary impact that can be discussed.