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Proof of alcohol
Why is alcoholic "proof" double its percentage (alcohol by volume)? I've read a few different explanations, and they make no sense to me. Why not call 50 percent ABV just 50 proof? Why is 50 percent ABV quantified as 100 proof? I've read a bunch of explanations that all point me back to 1848 when this standard was created (at least in America). By why concoct a more confusing system of measurement?
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1987 Venetian Blue (looks like grey) 930 Coupe
1990 Black 964 C2 Targa
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