see that's the thing, i have never seen this theory of Mr. F saying that 0F is the coldest you can get water to without freezing it. i guess that's why he started his scale at 0, but that doesn't change anything right? how does what you are saying not apply to celsius? 0C is supposed to be freezing, but you can get it much lower now you say. well Celsius needs an adjustment too right? they are all arbitrary numbers, and like pHaestus says, the measuring device will determine the accuracy. Mr. Farenheit says 0 was the lowest you can get water without freezing, and now they get it down to -20F or whatever, fine, now we make an adjustment, its -20F.
with a mathematical formula, X degrees in farenheit, will always, and i mean always, be Y degrees in celsius. there is no way for one to be more accurate than the other. the creators might have been incorrect, but their scales remain the same.
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