Don't back this up with any facts that can be debated. Just tell him he is wrong and refuse to provide any further explanation. Nothing will anger an argumentative person more than hearing they are wrong, especially if they are right. Even if the other person's argument seems to be valid, demand proof for any claims that they make. Refuse to debate the issue further until he proves his claim to you. Try to create as much legwork as possible for your antagonist. Make it too exhausting and time consuming to continue to have an argument with you. If your opponent happens to use words incorrectly while arguing, be sure to stop him and point it out. This will not only disrupt his momentum while speaking, but make him feel intellectually inferior as well. The more nitpicky and irrelevant your "corrections" are, the better. You know, they send you a three-paragraph argument and you answer with "You're" when they use "Your". Be as condescending as possible to make yourself seem superior. For example, you can offer to use smaller words so he can understand you better. Roll your eyes. Look up and to one side and slowly move your eyes until you see the opposite side of the room. It helps to shake your head slightly while rolling the eyes. This expression will show that you find your opponent ridiculous and stupid. Cite movies, television shows, or other completely unrelated figures as authoritative voices. Quoting song lyrics also works great. This method is very difficult to combat as he will first have to figure out whether you are serious or not before he can come up with a response. For example, if someone is trying to start an argument of American foreign policy, a possible response could be, "Well, as Billy Joel said, 'We didn't start the fire.'" If the argument is over something that is not important, be sure to point out that your antagonist is blowing it out of proportion due to their mean nature. Argumentative people like to act as though every argument is important because it is really just about being right. If you show your opponent how their arguing can be viewed as a fault in their character, it may make them more reluctant to engage you further. Forget whatever topic the argument might be about and focus on becoming insulting and rude. For example, if you begin to lose a debate about poverty you could say, "You should spend less time worrying about poverty and more time figuring out a new hair style." This kind of attack does nothing for winning the actual argument, but hurling insults can often quiet down and humiliate aggressive opponent. Of course, it could also end up turning into a physical fight, so watch out.
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One-sentence summary -- Tell him he is wrong. Demand proof. Point out bad grammar. Patronize him. Cite ridiculous, irrelevant sources. Point out pettiness. Make it personal.

Article: Bullies, whether at school, work, or the playground, can make you feel like crying. Fortunately, there are people you can turn to for help if you're being bullied. These are all signs of bullying:  Someone uses his or her power over you to control or hurt you. For example, a much larger kid at school pushes you around, or someone uses personal information about you to get you to do things you don't want to do. A bully might also isolate you from friends or keep you from getting to do things at school. Bullying can be physical, verbal, or social. Physical bullying includes things like hitting, pushing, and tripping. Verbal bullying includes things like teasing and name-calling. Social bullying includes things like leaving you out of things, telling other kids not to be friends with you, and intentionally embarrassing you.  If these things happen to you on a regular basis, you may be being bullied. Talk to a trusted parent, teacher, or counselor for help. Don't try to confront the bully yourself; you could put yourself in danger. Even your "friends" can bully you. Good friends will be kind and supportive. Teasing will be playful, not malicious, and real friends will stop teasing if you ask them to. If you generally feel bad when hanging out with your friends, it may be a sign that they aren't really your friends. Sometimes, your surface emotions are covering up something much deeper. Push to see if some other emotion is below, and what is causing that emotion. Maybe you're crying at school when someone criticizes you, but what's really bothering you is something to do with your boyfriend or girlfriend. If you can figure out what's really bothering you, you can take steps to improve the situation, such as having a serious discussion with the person. Being stressed can cause you to feel more emotions and act out on them more. For instance, you may find yourself feeling more anxious or irritable, and you may find yourself crying more often.  You might also be more anxious in general and find yourself getting angry at people more easily.  You could also have physical symptoms, such as not being able to sleep well, having headaches, feeling extra tired, and being more susceptible to sickness. If you're a woman, your tears could be related to your menstrual cycle. Some women experience premenstrual syndrome, which can start a week or two before your period. It's most likely related to hormones. This syndrome can cause you to feel emotionally unbalanced while it is going on, including inducing more tears. Uncontrollable emotions, especially if they are constant, could be a sign of something a little more serious. For instance, it's possible you could be clinically depressed or have an anxiety disorder. If you feel like you cry too much and you have other symptoms for long periods of time, talk to a doctor about it. Symptoms that could be more serious include pervasive anxiety, constantly feeling afraid or like something bad is going to happen, feeling detached from life, feeling continually sad, or always feeling bad about yourself.
Question: What is a summary of what this article is about?
Determine whether you are being bullied. Push deeper. Look for signs of stress. Pay attention to your cycle. Watch for deeper causes.