A person who is complaining about the strength of a drink after drinking others of the same strength is demonstrating what sign of intoxication?

When a person's judgment is impaired due to intoxication, their ability to accurately assess and evaluate their own alcohol consumption becomes compromised. They may have difficulty accurately perceiving the strength or effects of the drinks they have consumed, leading to inconsistent or erroneous assessments. This can manifest as complaints about the strength of a particular drink, even if it is similar in strength to the ones they have previously consumed.
Impaired judgment is a common symptom of alcohol intoxication and can affect decision-making, risk assessment, and self-awareness. It is important to recognize that impaired judgment can lead to risky behaviors and an increased likelihood of further alcohol consumption, potentially exacerbating the effects of intoxication.