Bad Adults<br>Gwen and her friends were hanging out at the park. Suddenly some adults came wandering into the area. Gwen could tell they were drunk because they stumbled. Suddenly the two adults began bickering and even fighting. All of the kids felt unsafe and left the park.
Stumbling is a good indication that someone is drunk.
The story says "Gwen could tell they [the adults] were drunk because they stumbled." But the text doesn't confirm that stumbling is a 'good' indication that 'someone' - even non-adult - is drunk.