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'Proof' is a term that used to refer to whether or not alcohol - when poured over gunpowder - would ignite. Modern chemistry has made for a different usage of the term:

Alcohol is now rated with a 'proof' equal to exactly twice it's alcohol content. Bud Light is 4.2% alcohol by volume in most of the U.S., so it would be 8.4 proof - though beer is rarely rated this way.

Many other alcohols, like vodka and whiskey, are rated around 40% alcohol by volume in the bottle, or around 80 proof. Of course, mixing with various sodas, juices, etc. - even melting ice - will dilute this percentage and 'proof' of what you're drinking.

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11y ago

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