<human>: Is there any way to find out if a person is an alcoholic just by smelling his breath?
<bot>: Yes, there are several ways to determine whether or not someone has been drinking alcohol. One of these methods is to use a device that measures the concentration of ethanol in the breath. This can be done using a breathalyzer test, which involves blowing into a machine that will measure the amount of ethanol present in the breath.