why is alcohol measured in proof?
<answer> The proof is a scale used to measure the amount of alcohol in a liquor. <context> A liquor is any alcoholic beverage that is produced by distillation. Many liquors, such as whiskey, vodka, rum, gin, and tequila list the alcohol content of the product in terms of a its proof. The proof is a scale used to measure the amount of alcohol in a liquor. The scale goes from 1 to 200. In the United States, the actual alcohol content, by volume, is half of whatever the proof number reads, so that a 200 proof liquor is 100% alcohol and a 100 proof liquor is 50% alcohol by volume. In other words, the proof is exactly twice the percentage of alcohol that the liquor contains. A liquor that is 200 proof, by this scale, is considered an absolute alcohol and a 100 proof liquor is ...