My approach would be: 1. Talk to Kara, why she prefers her approach and not yours. Don't tell her that the icon is wrong. Ask her, if the icon could be changed

My approach would be: 1. Talk to Kara, why she prefers her approach and not yours. Don't tell her that the icon is wrong. Ask her, if the icon could be changed to the other. Maybe she is right and you are wrong. She's the expert in this scenario, not you. If shes professional and her approach is wrong, she will see the mistake and adopt your idea. After that, let it pass and don't go out and tell everyone she was wrong. That's not very humble and fair. 2. If you really think you are right, be subborn. Stubborn people are more successfull then non-stubborn people if you look at statistics. That's why most subborn people are working in management. 3. Don't approach disputes based on a single formula. Be diplomatic, stubborn, helping and supportive. Fight the good fight. 4. Don't talk about the fight club.