Pride can be a killer in relationships. The desire to be right can drive you and your partner to insanity by always competing with one another.
Do state your opinion and if you feel passionate about it, fight for it. But there is no reason to start a world war over who makes better lasagna though.
Everyone has a desire to be right. And there are many occasions where being right will take you far!
But most of times insisting on being right will drive you and your partner apart.