You can't win an argument with someone, if he/she always think that he/she is right, that they knows better than you, that they are more knowledgeable than you. Even how many times you explained your side, they will not listen to that because their mind are already close on what they think is right. You will be wasting your time depending yourself and in the end, they wouldn't believe what you've said. There are many people who are like this especially those who are more educated than others. They tend to belittle your ideas because they think that you don't have enough knowledge on something because you don't finish schooling or you just stop at lower grades. It is sad, but it happens in reality. If it is the case, you will lose your voice to speak up , you will lose confidence in yourself because you will think that your ideas or whatever words you would say will be rejected.