Strawman is a logical fallacy in which a person attacks a position that his or her opponent doesn't really hold. It could be done deliberately when a person has nothing to offer against the real argument and wants to distort it to be able to attack it. Or it could be done accidentally when a person doesn't get the opponent's argument.  

Adam: So you're trying to say that psychology, political science and other liberal arts degrees are useless!? Look at Mary: she's a psychology major and she's got a very successful private practice..Or look at John: he studied international relations and now he's a popular podcaster and he's already paid off his loans! Most people I know who went to college are doing well now..

ET: Not at all, I'm not claiming that liberal arts degrees are useless. On the contrary, they can be enlightening and worthwhile for many people, especially those who are genuinely interested in pursuing careers related to liberal arts degrees. All I'm saying is that you don't have to do what you don't like to do just because you or your parents are seeking status in the form of a college degree. Carpenters are just an example, there're lots of vocations that don't require degrees and are compensated handsomely. There are lots of people who have a great potential for these vocations and who could do easily without a college degree.  

Full dialogue here: All argumentation fallacies

Video example: