So drinking automagically means impaired?
Alcohol is a depressant drug and therefore slows down reaction time and affects judgement with just one drink. Controlled studies prove this ad nauseam.
One to two drinks of alcohol impair mental and physical abilities; mental processes such as restraint, awareness, concentration and judgment are affected, reaction time slowed, and an inability to perform complicated tasks.
{“The Effects of Alcohol and Other Drugs,” Motorcycle Safety Foundation, Irvine, CA, 1991}
Any blood alcohol level, even a BAC of 0.02%, the result of just one drink, increases the risk of a crash. Alcohol impairs nearly every aspect of the brain’s ability to process information, as well as the eye’s ability to focus and react to light.
{University of California, Berkeley, Wellness Letter, Jan. 1998}
Impairment in performance begins at below 0.02% BAC (1 to 1-1/2 drinks can result in this level).
{NIAAA - Alcohol Problems and Aging: 1998 U.S. Dept. of Health and Human Services
The blocking of inhibitions is caused by alcohol's action on the higher centers of the brain's cortex, particularly the part of the brain that controls reason and judgment. It then acts on the lower centers of the limbic system that rule mood and emotion, and even at low-to-medium doses can increase self-confidence, sociability, and sexual desire, but can also result in aggression, violence and sexual assault. This disinhibition is mostly due to the interference with GABA, an inhibitory neurotransmitter.
{Alcoholmd.com - October 2001}
Even a small amount of alcohol can affect your balance and reflexes.
{National Institute on Aging - 2003}
Even one beer (or one drink) can slow your reactions and confuse your thinking. This means anything that requires concentration and coordination - like driving - is more dangerous when you’ve had a drink. Drinking is a problem if it interferes with how you think or feel.
{familydoctor.org - May 2003}
The most common response denying alcohol's affect on mood and judgement is "I'm unique".