Final answer:
Swott Malt Whiskey's alcohol proof is typically tested using equipment like a hydrometer or alcoholometer to gauge its alcohol by volume, but the provided information about an interstellar cloud is not relevant to such beverages as it only has an alcohol proof of 0.2.
Step-by-step explanation:
The alcohol proof of Swott Malt Whiskey or any alcoholic beverage is determined by specific tests to measure the alcohol content. However, the information provided mentions an interstellar cloud with an alcohol proof of only 0.2, which is significantly lower than any alcoholic beverage on Earth. Typically, an alcohol proof of 0.2 would not be sufficient for any drink to be considered an alcoholic beverage, much less a stiff drink, as traditional alcohol proofs are much higher to be considered as such.
For example, in the United States, a proof is twice the percentage of alcohol by volume, so an alcoholic beverage with 40% alcohol by volume would be 80 proof. The testing of Swott Malt Whiskey's alcohol proof, though not detailed here, would generally involve gauging its alcohol by volume (ABV) percentage through a standard procedure involving equipment like a hydrometer or alcoholometer.