False Dilemma is a logical fallacy in which somebody limits the number of options in an argument, e.g. presenting two options when there are in fact more than two options.
Adam: Well, when a person finishes high school, they should do something good with their lives that is go to college to prosper and contribute to society or else they will end up using drugs and they will wind up in jail.
ET: There's absolutely no reason to believe that there are only two outcomes after you finish high school. You can explore many other options like going to a trade school, joining an apprenticeship program or starting your own venture.