Why test alcohol myths at all
Most people who drive after drinking do not think they are drunk. They think coffee worked, water diluted it, food covered it, or sleep cleared it. These beliefs feel true because each one has a kernel of real physiology wrapped in a wrong conclusion.
This quiz separates the kernel from the conclusion. Every answer includes the mechanism — what actually happens in the body — because "myth" alone teaches nothing. Play it straight through, then send it to the person in your life who still believes the coffee one.
Take the quiz
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The pattern behind every sobering myth
Every myth in this quiz shares one structure: it takes something that changes how you feel (alertness, warmth, hydration, comfort) and claims it changes how much alcohol is in your blood. Those are two different systems. The first runs through your nerves and mood. The second runs through your liver, at a rate your choices cannot command.
The average liver clears about 0.015 percentage points of BAC per hour — roughly one US standard drink — with individual variation in both directions. Multiply the myths you want: the rate stays. The sobering-up guide walks through what that means in hours for real drinking sessions.
The drink-counting myths deserve their own paragraph
"I only had two beers" is the sentence that ends most impaired-driving stops, and it is meaningless without volume and ABV. Two 500 ml cans of 8% beer are about 63 g of ethanol — four and a half US standard drinks, and past 0.08% modeled BAC territory for a 75 kg person. Two 330 ml cans of 4% are closer to 21 g — one and a half standard drinks.
This is why our calculators never count "drinks" — they count milliliters × ABV. The standard-drink guide shows the same serving under US, UK, Australian and Canadian definitions, and the results are not interchangeable.
The morning-after trap
Half of the people who fail a morning breath test are surprised by it. The arithmetic is unforgiving: BAC of 0.20% at 2 a.m., clearing at 0.015/hour, still reads about 0.08% at 8 a.m. and only approaches zero around midday. Coffee, shower and breakfast change none of it.
The driving-after-drinking guide covers this trap in detail, including why "I feel fine" is the least reliable measurement instrument available to you at 8 a.m.
Where the answers come from
Each explanation reflects standard public-health teaching from the sources below — NIAAA, CDC and NHTSA — plus basic pharmacology. Where evidence is genuinely mixed (food, diet mixers, vomiting), the answer says so instead of pretending certainty. Our about page describes how every page on this site handles sources and corrections.