Addiction hijacks the mind, and then confirmation bias boots free will right out the door.
It can drive a family crazy trying to understand "why they won't stop...why they can't see what they're doing to themselves..." when surely things like losing a job or a wife are pretty clear indicators of a problem.
Understand confirmation bias and get a sneaky look inside an alcoholic mind - and understand why they never seem to see the problem.
You may think that a few drinks loosens you up and makes you better company. Let me tell you though, more than a few drinks sure does the opposite, and this, I know from experience.