Enforcing Safe Drinking Rules: Identifying the Right Groups to Check

1. Checking groups (1) and (4) would help to confirm that the rule is being followed.

• Group (1): By checking people who are drinking alcohol, you can directly verify if they are 18 or older, as the law states that only individuals of this age can consume alcohol.

• Group (4): Checking people who look younger than 18 would also be useful, as it would help identify potential underage individuals who might be consuming alcohol illegally.

2. No, the person is not correct. If someone suggests checking groups (1) and (2) to enforce the safe drinking rules, they would be committing a behavioral bias known as confirmation bias. Confirmation bias is the tendency to favor information that confirms one's preexisting beliefs or hypotheses while ignoring or downplaying contradictory evidence.

In this case, by only checking groups (1) and (2), the person is assuming that those who look 18 or older are more likely to be following the rule, potentially ignoring potential underage individuals who may be consuming alcohol illegally or adults who may be providing alcohol to minors. This bias overlooks the importance of checking groups (3) and (4) to ensure comprehensive enforcement of the safe drinking rules.