On a scale of one to 10, would you be able to estimate exactly how drunk you are after a night out at the bars? A new study thinks not, Ars Technica reports. Over several months, researchers bar-hopped across different neighborhoods in Cardiff, U.K., interviewing patrons on their perceived level of intoxication and then administering a blood alcohol breathalyzer test. As noted in the BMC Public Health study, not only were people totally unable to estimate their level of drunkenness, but they felt more drunk when in the presence of sober people and less drunk in a group that was more highly intoxicated. The researchers think the new findings might be useful in reducing dangerously excessive drinking by introducing more sober people into bar situations.