In life, we are taught to never give up when it comes to trouble. When you have a goal, and you fail, you should pick yourself up and try again. This is known as persistence. Of course, there are other ways it can manifest. A glaring example is when a kid wants a certain toy or game, and they beg their parents nonstop.
When it comes to adults, some people just want to shove their opinion down your throat or get their unwanted point across. If this is down in a heated situation, nothing good can result from it. This is especially the case if the parties are both intoxicated and one person is being aggressively persistent.