Answer: The sign of intoxication by itself is slurred speech. Slurred speech refers to a condition where a person's speech is unclear, mumbled, or difficult to understand. It is often caused by the depressant effects of alcohol on the central nervous system. When a person is intoxicated, their brain functions are impaired, including their ability to control their speech muscles. As a result, their words may be slurred, and their pronunciation may be altered. Slurred speech can be a strong indication that someone has consumed alcohol or is under the influence of other substances that can cause similar effects.