If your boss is wrong over something minor, alerting them to this may come off as condescending. [substeps] How much is the issue really affecting your work life? If you disagree with your boss on something minor, such as policies regarding lunch breaks, it's probably only a minor inconvenience for you and other employers.
[header] How to kindly tell your boss that he or she is mistaken [title] Decide how important the issue is. [step] Telling your boss they're wrong can have an impact on your relationship. Therefore, you want to make sure the issue is worth discussing before bringing it up.