Final answer:
Drinking coffee cannot speed up the process of becoming sober from alcohol; caffeine may increase alertness but does not affect the alcohol metabolism by the liver.
Step-by-step explanation:
The idea that drinking coffee is a good way to get sober is false. While coffee contains caffeine, which is a psychoactive drug that stimulates the central nervous system and can make you more alert and improve concentration, it does not accelerate the metabolism of alcohol in the body. The only effective way to avoid alcohol toxicity is by giving the liver enough time to metabolize the ingested alcohol. Therefore, while coffee may make you feel more awake, it does not reduce blood alcohol content (BAC) or lead to sobriety after alcohol consumption.