If a guest makes irrational or argumentative statements and starts buying drinks for strangers, the guest is exhibiting _________.

Impaired judgment is a common effect of alcohol consumption, where individuals may make irrational or argumentative statements and engage in behaviors that they might not typically engage in when sober, such as buying drinks for strangers. It is one of the cognitive and behavioral effects of alcohol that can occur due to the depressant effects of alcohol on the central nervous system.
Other effects such as impaired motor coordination, relaxed inhibitions, and slowed reaction time can also be present, but impaired judgment specifically relates to the irrational and argumentative statements and the behavior of buying drinks for strangers in this context.