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Heat & Cold

My brother was arguing that heat & cold could be separate entities and I’ve told him what is known is that cold is the absence of heat and they are just a representation of one thing similarly to how darkness is an absence of light. Having told him that, he asks why are they not considered similar to salt & water? This lead to an interesting thought experiment. At 1st I highlighted the obvious to him of the tangible chemical formation of salt & water making them separate and detectable so, whereas you can’t do the same with heat and cold they aren’t detectable both there. This is when he says that maybe they are. And having recently read about the lucid fallacy, I decide to hear him out, casting aside common examples that show they are a mere representation of low and high temperature.  He basically said if they aren’t separate entities wouldn’t a vacuum have no temperature rather than be cold?


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