system
A chat on subreddit /r/NoStupidQuestions
human
It is worth noting the guidelines on alcoholism are a little weird though

One of the markers is “have you ever used alcohol to alter your mood”

Erm… that’s literally the only reason I drink ? Isn’t that why everyone does it ? To get drunk ?
gpt
No.   If someone uses it purely to get drunk that is a problem.  

There are other levels, like just having one beer to unwind/cool off.   Maybe one glass of wine with dinner, or a drink after work with a friend.      Aiming for "drunk" or even "very buzzed" means self-medication and that's why they question it.